Why We Get Sick: How the Body Heals Itself and Why We Left the Hakeem

You wake up with a scratchy throat. By night you are shivering under a quilt with a fever, and by the third morning you feel almost human again. Nobody operated on you. You took some chai, maybe a Panadol, and slept. So who actually did the healing?

The honest answer is your own body. Your body does most of the healing. This is the single most useful fact in all of health, and most of us never get told it plainly. Understanding why we get sick, and how the body repairs itself, changes how you think about every pill, every prescription, and every herbal remedy your grandmother swore by. It also explains a quiet historical shift that touches every household in Pakistan: how the hakeem, once the family doctor for the whole subcontinent, slowly gave way to the MBBS clinic down the road.

Why we get sick: the five honest reasons

Disease feels random when it hits you, but the reasons why we get sick almost always trace back to a handful of causes. Sometimes one acts alone. More often two or three stack up.

Pathogens: the germs that want your cells

The reason most people think of first is infection. Bacteria, viruses, fungi, and parasites are everywhere, and a slice of them have evolved to live off us. A flu virus hijacks your cells to make thousands of copies of itself. Typhoid bacteria multiply in your gut and bloodstream. Malaria parasites, carried by a mosquito, burst your red blood cells on a clock you can almost set your watch to.

Germ theory, the idea that tiny living things cause specific diseases, was only proven in the late 1800s by Louis Pasteur and Robert Koch. Before that, even brilliant physicians blamed bad air. The World Health Organization still ranks lower respiratory infections, diarrhoeal disease, and tuberculosis among the top killers in lower-income countries, and Pakistan carries a heavy share of all three. (who.int)

When your own defence turns on you

Not every illness comes from outside. Sometimes the immune system, the very thing meant to protect you, gets the target wrong. In type 1 diabetes it destroys the insulin-making cells in the pancreas. In rheumatoid arthritis it attacks the joints. In allergies it overreacts to harmless things like pollen or peanut protein. These are called autoimmune and allergic conditions, and they are a reminder that a defence system this powerful can be dangerous when it misfires.

Lifestyle: the slow diseases we build ourselves

The biggest health story of the last fifty years is that we now mostly die of diseases we partly create. Heart disease, type 2 diabetes, most strokes, many cancers, and fatty liver are driven hard by what we eat, how much we move, whether we smoke, and how we sleep. In Pakistan this hits early and hard. South Asians develop diabetes and heart disease at lower body weights than Europeans, a pattern often called the thin-fat phenotype. A plate piled with white rice, fried snacks, and sugary chai, eaten while sitting all day, is a slow-motion cause of sickness even when no germ is anywhere near you.

Genetics and the hand you were dealt

Some risk is written into your DNA before you take your first breath. Thalassaemia, common across Pakistan partly because of cousin marriage, is a clear example. So is a strong family history of early heart attacks. Genes rarely doom you outright. More often they load the gun, and lifestyle pulls the trigger.

The environment you cannot opt out of

Then there is everything around you. Air pollution in Lahore and Karachi sits at levels the WHO considers hazardous for much of the year, and dirty air is now firmly linked to lung disease, heart attacks, and stroke. Contaminated water spreads hepatitis and typhoid. Workplace dust, lead, and aflatoxins in poorly stored grain all quietly raise disease risk. You can change your diet. You cannot easily change the air over your city.

How the body defends itself: two armies, one war

Once you understand why we get sick, the next question is how the body fights back. Your immune system is not one thing. It is two cooperating defence systems with very different personalities. One is fast and dumb. The other is slow and brilliant. You need both.

Innate immunity: the bouncers at the door

The innate immune system is what you are born with. It does not care which specific germ showed up. It reacts within minutes to anything that looks foreign. Your skin and the acid in your stomach are the first wall. Behind them sit patrol cells with names like neutrophils and macrophages, which swallow invaders whole, plus chemical alarms that summon reinforcements. When you get a splinter and the area goes red, hot, and sore, that is innate immunity at work in real time.

Adaptive immunity: the specialists who remember

If the bouncers cannot finish the job, the adaptive immune system takes over, and this is where the genius lives. It has two main players. B cells make antibodies, Y-shaped proteins that lock onto one specific target and tag it for destruction. T cells come in flavours: some kill infected cells directly, others coordinate the whole response.

The slow part is the point. Adaptive immunity takes days to ramp up the first time it meets a germ, because it has to find the one cell in millions that happens to match. But once it wins, it keeps memory cells on standby. Meet the same germ again and the response is so fast you may never notice you were infected. That memory is the reason you usually catch chickenpox only once. It is also the entire basis of vaccines.

A vaccine does not fight the disease for you. It hands your adaptive immune system the enemy’s photograph, weeks before the enemy ever arrives.

Here is how the two systems compare side by side.

Feature	Innate immunity	Adaptive immunity
Speed	Minutes to hours	Days, first time
Specificity	General, reacts to any threat	Targeted to one specific germ
Memory	None, reacts the same every time	Yes, remembers for years or life
Main cells	Neutrophils, macrophages	B cells, T cells
Key weapon	Swallowing germs, inflammation	Antibodies, killer cells
Trained by vaccines?	Not directly	Yes, this is how vaccines work

Fever and inflammation are features, not bugs

When you run a fever, it is tempting to treat the number on the thermometer as the disease. It is not. A modest fever is your brain deliberately raising body temperature because many germs grow worse when it is hot, and your own immune cells work faster. Inflammation, the redness and swelling around an injury or infection, is the body widening blood vessels so defence cells and repair materials can flood in.

This matters in practice. Reaching for a fever-reducer the moment the thermometer ticks up is not always wise. A high fever in a child, one that will not come down, or one with a stiff neck or rash, is a real emergency. A mild fever in an otherwise well adult is often the body doing its job. The point is not to suffer needlessly, it is to understand that the symptom and the enemy are different things.

How the body repairs the damage

Fighting the germ is only half the work. After the battle, the body rebuilds. A cut clots within minutes, then platelets and growth factors call in cells that lay down new tissue. Bone, remarkably, heals so well that a clean break often ends up as strong as it was before. The liver can regrow a large chunk of itself. Even after a bad bout of flu, the lining of your airways resurfaces over a couple of weeks. Healing is not magic. It is your body spending energy and raw materials to put cells back where they belong.

How modern medicines actually work

If your body does the healing, what are the pills for? This is where a lot of confusion lives, so it helps to be precise. Most medicines do one of three jobs: kill or slow an invader, train your defence in advance, or keep you comfortable and stable while your body wins.

Antibiotics: against bacteria only

Antibiotics kill bacteria or stop them from multiplying. They do nothing at all against viruses. This single fact is misunderstood across Pakistan, where people routinely buy antibiotics over the counter for a viral cold or sore throat. The drug does not touch the virus, the cold clears on its own as it always would, and the person credits the antibiotic. The real cost is hidden and serious: every needless course pushes bacteria to evolve resistance. Pakistan now has some of the highest rates of antibiotic resistance in the world, including strains of typhoid that shrug off most older drugs. (cdc.gov)

Antivirals, painkillers, and supportive care

Antivirals are harder to make than antibiotics, because viruses live inside your own cells, so a drug has to hurt the virus without wrecking the cell. The ones we have, for HIV, hepatitis C, and influenza, are genuinely powerful. Hepatitis C is now curable in most cases with a few weeks of tablets, a stunning change for a disease that was once a slow death sentence. (who.int)

Then there is supportive care, which is quietly the most common kind. A painkiller does not cure the flu. Oral rehydration salts do not kill the bug causing diarrhoea. What they do is keep you stable, hydrated, and out of pain so your body can finish the fight without tipping into danger. If you want the deeper story of how a painkiller actually dulls a signal, the science of pain is worth your time, as is the surprising history of paracetamol sitting in your medicine drawer.

Vaccines: medicine you take before you are sick

Vaccines are the one medical tool that prevents the disease rather than treating it. They work by showing your adaptive immune system a harmless piece of a germ, so the memory cells are already standing guard when the real thing arrives. The eradication of smallpox and the near-eradication of polio are the most successful health interventions in human history. Pakistan remains one of only a handful of countries where wild polio still circulates, which is why the vaccine drives never stop.

The hakeem: the family doctor of the subcontinent

For roughly a thousand years, when someone in this region fell ill, they went to the hakeem. The system he practised is called Unani, from the Arabic word for Greek, because it descends from the medicine of Hippocrates and Galen, carried east through the Arab world and refined in India. Locally it is also called Tibb. At its peak it was sophisticated, organised, and the only real medicine most people had.

What Unani medicine got genuinely right

It would be arrogant to dismiss a tradition that kept a civilisation alive for centuries. The hakeem got real things right. Diet and lifestyle sat at the centre of treatment, long before modern medicine rediscovered that food and sleep shape disease. Many of the herbs in the Unani pharmacy contain genuinely active compounds: the same plant world gave modern medicine aspirin (from willow bark) and the malaria drug artemisinin (from sweet wormwood, a discovery that won a Nobel Prize). Careful bedside observation, taking the pulse, watching the patient over days, was a real diagnostic skill. And the holistic idea, that you treat the whole person and not just one organ, is something modern medicine arguably lost and is now trying to relearn.

What it got wrong

It also carried serious errors. The core theory, that health is a balance of four humours (blood, phlegm, yellow bile, black bile), is simply not how the body works. Without germ theory, the hakeem could not explain or stop an epidemic. Some traditional preparations are unsafe: a number of South Asian herbal and metal-based remedies sold today have been found contaminated with dangerous levels of lead, mercury, or arsenic, a real and documented cause of poisoning. (ncbi.nlm.nih.gov) Good intentions and centuries of use do not make a remedy safe.

Why we left the hakeem (and what we kept)

The shift away from the hakeem was not a single event. It was a slow defeat by a better method, and method is the whole story.

Germ theory changed everything

Once Pasteur and Koch proved that specific microbes cause specific diseases, a door opened that the humoral system could not walk through. You could now identify the exact cause of cholera, then target it. Vaccines, antibiotics, and clean-water campaigns followed, and they worked at a scale no herbal remedy ever matched. The hakeem had no answer to this, because his framework had no microbes in it.

The deeper change was the rise of the controlled trial. Modern medicine made a radical promise: do not trust a remedy because it is old or because a respected man swears by it. Test it. Give it to one group, give a dummy to another, and measure the difference. This is the single thing the hakeem tradition never built, and it is why a herb that genuinely works can be turned into a reliable drug while one that only seems to work gets dropped.

Colonial and then national medical systems also poured money, hospitals, and licensing into the modern model. Over a century, the MBBS doctor became the default, and the hakeem moved to the margins. Regulation matters too: a modern pharmacy must prove its dose; a roadside herbal seller need prove nothing.

Dimension	Unani / hakeem tradition	Modern (allopathic) medicine
Theory of disease	Imbalance of four humours	Germs, genes, cells, organs
How a remedy is judged	Tradition, authority, experience	Controlled clinical trials
Dosing	Often variable, preparer-dependent	Standardised and measured
Strongest at	Diet, chronic care, observation	Infection, surgery, emergencies
Main weakness	No proof standard, some toxic preparations	Can over-medicate, treats parts not person
Safety oversight	Largely unregulated	Licensed and inspected

The hakeem in Pakistan today

Walk through any old bazaar in Lahore, Karachi, or Peshawar and the hakeem has not vanished. Herbal shops still line the streets, selling everything from joshanda for a cold to weight-loss and fertility mixtures. Many people use both systems at once, often without telling either practitioner. That is the honest current reality, and it carries a real risk: a herbal remedy can interact dangerously with a prescription drug, and a contaminated tonic can poison slowly. The sensible path is not to mock tradition or to romanticise it. It is to ask, of any remedy from any source, the same modern question. Where is the evidence?

A fair verdict

Understanding why we get sick, in the end, is what separates the two systems. The hakeem was not abandoned because everything he did was useless. He was overtaken because modern medicine could do something his tradition never could: prove what works, reproduce it, and measure the dose. Some traditional remedies hold real value, and a few have already become modern drugs once science confirmed them. Some are useless. Some are genuinely dangerous. The job now is not to pick a side in a culture war. It is to keep what survives honest testing, and to apply the same standard of evidence to a herb in a bazaar and a tablet in a pharmacy. Your body remains the healer either way. The only fair question about any treatment is whether it truly helps your body win, and whether we can prove it.

Frequently asked questions

Does the body really heal most illnesses on its own?

For most common infections, yes. Colds, mild flu, ordinary food poisoning, and most coughs clear because your immune system clears them, usually within seven to ten days. Medicine often just keeps you comfortable or safe meanwhile. The big exceptions are serious bacterial infections, chronic diseases, and emergencies, where the body cannot win unaided and proper treatment is genuinely lifesaving.

Why are antibiotics useless against the flu or a cold?

Antibiotics are built to attack bacteria, targeting structures that viruses simply do not have. Colds and flu are caused by viruses, so the drug has nothing to act on. Taking antibiotics for a viral illness does not speed recovery at all. It only kills helpful bacteria in your gut and pushes harmful bacteria to evolve resistance, which is a serious and growing problem in Pakistan.

Is fever dangerous or helpful?

A mild to moderate fever is usually helpful. It is your body deliberately raising temperature to slow germs and speed up immune cells, so it is a sign the defence is working. The danger is in the extremes: very high fevers, fevers with a stiff neck, rash, confusion, or breathing trouble, and any fever in a baby under three months. Those need a doctor, not patience.

Was Unani medicine completely wrong?

No, and saying so would be unfair. Unani medicine valued diet, rest, and careful observation, and many of its herbs contain genuinely active compounds, some of which became modern drugs. Its core theory of four humours was mistaken, and a few traditional preparations are unsafe or contaminated with heavy metals. It was a serious system with real strengths and real errors, like all early medicine.

Are herbal remedies safe because they are natural?

Natural does not mean safe. Many plants contain powerful chemicals, and some traditional South Asian tonics have been found contaminated with lead, mercury, or arsenic. Herbal remedies can also interact dangerously with prescription drugs. A few have real benefits proven by research. The safe approach is to tell your doctor everything you take and to favour remedies that have actually been tested.

Do vaccines weaken the natural immune system?

The opposite is true. A vaccine works by training your natural adaptive immune system, showing it a harmless piece of a germ so it can build memory cells in advance. When the real germ arrives, your own immune system recognises and destroys it fast. The vaccine does not replace your immunity or weaken it. It prepares it, which is exactly what natural infection does, but without the danger of the disease.

Should I choose modern medicine or the hakeem?

For infections, emergencies, surgery, and chronic disease management, modern medicine has proof and tools no traditional system can match. For diet and lifestyle, the old wisdom about food and rest still holds. If you use traditional remedies, treat them like any drug: ask for evidence, watch for contamination, and tell your doctor. The deciding question is never the tradition. It is the proof.