Last reviewed on 12 September 2026.
NNWA publishes the name and qualifications of everyone who writes and checks its material. You can see the full teaching team on the faculty page.
This page sets out what to drink, what to eat and how often, what changes in dengue season, and the signs that need a doctor. Food supports recovery; it does not treat the infection behind the temperature, and it is never a reason to put off a blood test.
What should you drink when you have a fever?
Water first, and plenty of it, then fluids that add some salt and energy: clear soups, dal water, rice kanji, buttermilk, coconut water and lemon water with a pinch of salt and sugar. Fever raises water loss through sweat and faster breathing, and someone too ill to eat often forgets to drink as well. If heavy sweating, vomiting or loose motion comes with the fever, switch part of that fluid to ORS; the page on what to eat in loose motion explains how to use it. Pale yellow urine every few hours is a fair sign that intake is keeping up.
Why does fever increase the need for food?
Because the body's energy use rises with its temperature. The figure usually quoted is roughly 10 per cent more energy for every degree Celsius above normal, though estimates vary and the real increase depends on the illness and the person. At the same time, infection speeds up the breakdown of muscle protein. A healthy adult tolerates a couple of days of fever on little food, but a week of it leaves real weakness, and older adults and people who were already thin lose ground faster. That is why regular small meals matter more than any particular superfood.
Is it true that you should starve a fever?
No. The saying "feed a cold, starve a fever" is folklore with no good evidence behind it, and it runs against what the body needs. A feverish person burns more energy, not less, and going without food makes weakness and dizziness worse. That does not mean forcing a full thali on someone with no appetite. It means offering small amounts of easy food often, and accepting that a few spoonfuls every couple of hours add up to more than one abandoned plate.
What are the best foods to eat during fever?
Soft, familiar, lightly spiced foods that are easy to swallow and digest: khichdi, dalia or oats porridge, idli, soft rice with thin dal, curd, mashed potato, boiled eggs, soups and ripe fruit. They give carbohydrate for energy and some protein for repair, without the fat that sits heavily on a queasy stomach. A bowl of broken-wheat dalia porridge, cooked soft with milk or as a salted version with vegetables, is gentle enough for the first days. Aim for a little protein at every small meal (an egg, a bowl of dal, some curd), since a body fighting infection draws on its own muscle when intake runs low. Salt and a pinch of turmeric are fine; save strong chilli and deep-frying for when appetite returns.
How often should you eat when you have a fever?
Every two to three hours, in small amounts, works better than three normal meals. Appetite in fever is often poor, food can taste flat or metallic, and nausea is common, so a large plate usually goes back half-eaten. A day such as a cup of milk or porridge on waking, idli mid-morning, soft dal-rice at lunch, fruit or buttermilk in the afternoon and khichdi at night covers the essentials without overwhelming anyone. Keep a glass of water or a bowl of soup within reach between these.
A day of small meals through a fever
Every two to three hours beats three full plates, because appetite is poor, food tastes flat or metallic, and a large serving goes back half eaten.
On waking
A cup of milk, or dalia or oats porridge cooked soft. Something warm and bland to start the day on.
Mid-morning
Idli with a thin sambar, or a bowl of curd. Soft, familiar and lightly spiced is the whole specification.
Lunch
Soft rice with a thin dal, or khichdi, with an egg or curd alongside. A body fighting infection draws on its own muscle when protein runs short, so keep some in every meal.
Afternoon
Ripe fruit or buttermilk. Banana, papaya, apple, pomegranate, orange, mosambi and watermelon are all easy, and whole fruit beats packaged juice.
Night
Khichdi again, or dal and rice. Keep a glass of water or a bowl of soup within reach between all of these.
Which fruits are good to eat in fever?
Most soft, ripe fruits are fine: banana, papaya, apple, pomegranate, orange, mosambi and watermelon. They add fluid, potassium, vitamin C and some easily handled sugar. Whole fruit is better than packaged juice, and juice pressed at home is safer than juice from a street stall, where ice and unwashed equipment are common routes of infection.
What should you avoid eating in fever?
Fried food, rich gravies, heavy sweets and very spicy dishes are the main things to put off, because they are hard to digest when the stomach is already unsettled. Street food, cut fruit and unboiled water risk adding a second infection to the first. Alcohol dehydrates and interacts with many medicines. Several cups of strong tea or coffee can also disturb the sleep the body needs to recover.
What should you eat in dengue fever?
Fluids are the centre of dengue care, and food follows the same soft, frequent pattern as any other fever. In dengue, the most dangerous phase often comes as the temperature falls, roughly between the third and seventh day, when fluid can leak out of the blood vessels and blood pressure can drop. Doctors therefore watch intake and urine output closely. Water, ORS, soups, coconut water and fresh juice all count. Dengue is confirmed with a blood test, and whether someone needs hospital care is judged by a doctor on the warning signs and the blood count, not on what the patient eats.
Does papaya leaf juice increase platelets?
The evidence is thin. A few small studies, mostly from South and Southeast Asia, reported a faster rise in platelet counts after papaya leaf extract, but they were small, varied in method and did not show that it prevents the serious complications of dengue. Papaya leaf juice is not a treatment, and a slightly quicker platelet recovery is not the same thing as a safer illness. It is bitter and can bring on nausea or vomiting, which is unhelpful when fluid intake matters most. Painkillers are a medical decision too: some common ones are avoided in dengue because they can worsen bleeding.
Does any food boost immunity during a fever?
Only in the broad sense that a well-fed body fights infection better than a starved one. No single food, spice or drink shortens a fever, and the kadha, haldi-doodh and giloy often pressed on the sick have little trial evidence behind them for that purpose; concentrated giloy products have even been linked to liver injury in a handful of Indian case reports. A steady supply of energy, protein, fluid and the vitamins and minerals in ordinary food is what the immune system actually relies on. The page on an immunity-supporting Indian diet covers what that looks like between illnesses.
When does a fever need a doctor?
See a doctor if a fever lasts more than three days, or sooner if it climbs to about 103°F (39.4°C) or above, or comes with a rash, bleeding from the gums or nose, black stools, a severe headache or stiff neck, breathlessness, repeated vomiting, severe belly pain, or confusion and unusual drowsiness. A temperature of 100.4°F (38°C) or more in a baby under three months needs medical attention the same day, as does a fever with a fit in a child of any age. Pregnant women and people with diabetes, heart or kidney disease or low immunity should not sit out a fever at home.
What should you eat once the fever breaks?
Return to normal meals gradually over a few days, following appetite rather than the calendar. Keep portions modest and bring back chapati, vegetables, eggs, fish or chicken and a little more oil as the stomach allows. Weakness often outlasts the fever by a week or more, and protein at each meal plus a decent night's sleep does more for it than any tonic. If the fever turned out to be typhoid, recovery takes longer and follows its own rules, set out on the page on what to eat in typhoid.
Learning to plan diets through illness
Feeding someone through an acute illness is a small version of what diet therapy does every day: adjusting texture, timing, energy and protein to what a sick body can handle. NNWA's Therapeutic Nutrition (Diet Therapy) course is an advanced two-month course covering diet therapy foundations, diabetes and metabolic diets, cardiovascular nutrition, digestive and liver conditions, building diet charts, and case-based practice. It is priced at 17,999 rupees (listed at 26,999), or 1,500 rupees a month on EMI, and awards NNWA certificates.
What to remember while the fever runs
Drink steadily, with ORS if sweat, vomiting or loose motion adds to the loss. Eat small, soft meals every few hours, with some protein each time, because fever raises energy use rather than lowering it. Khichdi, porridge, idli, dal-rice, curd, fruit, eggs and soup cover almost every need. In dengue season, fluids come first and papaya leaf is not a cure. A fever lasting beyond three days, or any of the warning signs above, belongs with a doctor.