What to Eat When Sick: Best Foods for Every Illness

Knowing what to eat when sick can make a real difference in how comfortable you feel and how well your body copes while it fights an illness. The right foods provide fluids and nutrients, soothe irritated tissues, and give your immune system the fuel it needs. The wrong choices can worsen nausea, strain an already unhappy digestive system, or make dehydration more likely.

Whether you are battling a cold, the flu, a stomach bug, or a sore throat, what to eat when sick depends on your specific symptoms. This guide covers the best foods for the most common illnesses, along with hydration strategies and the warning signs that mean it is time to call a clinician. It draws on general guidance from sources such as the CDC, Mayo Clinic, MedlinePlus, and USDA MyPlate. It is educational information, not medical advice for your specific situation.

The Foundation: Hydration First

Before worrying about which specific foods to eat, focus on fluids. Dehydration is one of the most common and most preventable complications of everyday illness, and it tends to make everything else feel worse. Fever, sweating, a runny nose, vomiting, and diarrhea all increase the amount of fluid your body loses.

Good options include water, warm herbal teas, clear broths, and diluted juices. When you are losing a lot of fluid through vomiting, diarrhea, or a high fever, plain water alone may not be enough, because you are also losing electrolytes such as sodium and potassium. Oral rehydration solutions and commercial electrolyte drinks are designed to replace both fluid and electrolytes, and the CDC notes that oral rehydration is the preferred way to manage mild to moderate dehydration for most people. Sip steadily throughout the day rather than gulping large amounts at once, which can trigger more nausea.

Best Foods for Colds and Upper Respiratory Infections

When a cold has you congested and run down, focus on foods that feel soothing, keep you hydrated, and deliver nutrients your body can use.

Chicken soup: This centuries-old remedy has some science behind it. Research published in the journal Chest suggested that chicken soup may have a mild anti-inflammatory effect on the movement of certain immune cells, and the warm broth helps thin mucus and keep you hydrated. Even setting the research aside, warm soup is easy to tolerate when your appetite is low.

Citrus and other vitamin C foods: Oranges, grapefruit, kiwi, strawberries, and bell peppers are rich in vitamin C. Vitamin C will not cure or prevent a cold for most people. Reviews summarized by MedlinePlus suggest that regular intake may modestly shorten cold duration in some people, but do not expect it to stop a cold in its tracks.

Garlic: Garlic contains sulfur compounds such as allicin that have been studied for immune effects. The evidence is limited and mixed, so treat garlic as a flavorful, nutritious addition to soups and cooked dishes rather than a proven cold remedy.

Ginger tea: Ginger has anti-inflammatory and antioxidant properties. Warm ginger tea can soothe a scratchy throat, help settle a queasy stomach, and add to your fluid intake.

For more targeted advice on eating during viral infections, see our guides on what to eat when you have COVID and what to eat when you have the flu.

Best Foods for the Flu

The flu tends to take a harder toll on your body than a typical cold. High fever, muscle aches, and sweating increase your fluid and electrolyte needs, and your appetite may vanish for a few days.

Broth-based soups: Clear broths and brothy soups provide fluids, sodium, and easily digestible calories in a form that is gentle on a tired appetite. Adding soft vegetables, noodles, rice, or shredded chicken makes them more filling as you start to feel better.

Bananas: Easy to digest and rich in potassium, bananas help replenish an electrolyte commonly lost through fever and sweating. They are also gentle on the stomach if nausea is present.

Oatmeal: A warm bowl of oatmeal provides sustained energy and fiber, and it is easy to eat when you are not feeling well. Oats also supply small amounts of zinc, a mineral involved in immune function.

Yogurt: Probiotic-rich yogurt is a soft, protein-containing option that many people tolerate well. Choose plain varieties with live active cultures and stir in a little honey or soft fruit if you want more flavor.

Hydrating fluids: Water, herbal teas, electrolyte drinks, and diluted juices are essential when fever is present. Mayo Clinic advises drinking plenty of fluids during the flu to help prevent dehydration and thin secretions.

Best Foods for Stomach Bugs and Nausea

When your stomach is upset, the goal is to rest your digestive system and reintroduce food slowly. Start with fluids, then move to bland, low-fat, easy-to-digest foods as your stomach allows.

Small sips first: After vomiting, wait a little while, then start with small, frequent sips of water, an oral rehydration solution, or a clear electrolyte drink. If you keep fluids down, gradually add bland solids.

BRAT-type foods: Bananas, rice, applesauce, and toast have long been suggested for upset stomachs because they are bland and easy to digest. The American Academy of Pediatrics no longer recommends a strict, prolonged BRAT diet because it is low in protein and nutrients, but these foods remain reasonable first choices during the acute phase before returning to a normal, balanced diet as tolerated.

Plain crackers: Saltine crackers are bland and provide small amounts of sodium and starch. Nibbling a few crackers before attempting a larger meal can help you test your tolerance.

Clear broth: Chicken or vegetable broth provides fluids and sodium without taxing the digestive system. Sip slowly and see how your stomach responds before increasing the amount.

Ginger: Ginger has been studied for nausea and is a common, low-risk option. Fresh ginger tea, ginger chews, or flat ginger ale can all help some people settle the stomach.

Foods to limit for now: Go easy on dairy, fatty or fried foods, very spicy dishes, caffeine, and alcohol until your stomach has recovered. These can worsen nausea, cramping, and diarrhea for some people.

Best Foods for Sore Throats

A sore throat makes eating painful, so the focus should be on soft, smooth foods, either cool or warm, that coat and soothe.

Warm honey and lemon water: Honey can soothe a sore throat and has been shown in reviews to help calm coughs about as well as some over-the-counter cough remedies in adults and older children. Stir it into warm water with lemon. Important safety note: never give honey to a baby under 12 months, because of the risk of infant botulism.

Smoothies: Cool, blended smoothies made with soft or frozen fruit, yogurt, and a splash of juice provide calories and hydration without chewing. The cold can also temporarily numb throat pain.

Mashed potatoes: Soft, warm, and easy to swallow, mashed potatoes provide energy-dense carbohydrates. Keep the seasoning mild.

Scrambled eggs: Eggs are a soft, protein-rich option that requires minimal chewing and supports tissue repair.

Popsicles: Frozen fruit pops can numb throat pain and add hydration. Look for options made with real fruit juice rather than mostly sugar water.

Best Foods for Fever

Fever raises your metabolic rate and increases fluid needs, and it often blunts appetite. Focus on easy-to-eat, calorie-containing foods and plenty of fluids, and do not force large meals.

Coconut water and electrolyte drinks: These supply fluid along with electrolytes such as potassium and sodium that can be lost through sweating.

Watermelon and berries: High-water-content fruits support hydration while adding vitamins and antioxidants. Watermelon is roughly 90 percent water, making it a refreshing, hydrating snack.

Avocado: Calorie-dense and rich in healthy fats, avocado provides energy without requiring much appetite. Spread it on soft toast or eat it plain with a pinch of salt.

Popsicles and frozen fruit: When solid food feels impossible, frozen treats can help maintain hydration and provide some calories until your appetite returns.

General Nutrition Principles When Sick

Regardless of the specific illness, several nutrition principles apply across the board:

Stay hydrated: This is the single most important step. Increase fluids if you have a fever, are vomiting, or have diarrhea, and use an oral rehydration or electrolyte solution when losses are heavy.

Do not force large meals: If your appetite is reduced, eat small, frequent meals rather than forcing three large ones. Even a few bites every hour or two is better than nothing, and fluids take priority if solids are impossible.

Prioritize protein: Your body uses protein to build and repair tissue and support immune cells. Include gentle protein sources such as eggs, yogurt, soft chicken, tofu, or protein smoothies whenever you can.

Include zinc-rich foods: Zinc plays a role in immune function. Some studies suggest zinc lozenges started very early may modestly shorten colds, though results are inconsistent and high doses can cause side effects, so food sources are a sensible everyday approach. These include beef, poultry, beans, chickpeas, pumpkin seeds, and fortified cereals.

Go easy on heavily sugary and ultra-processed foods: They add calories without much nutrition and can crowd out more nourishing choices. A balanced plate of fluids, gentle carbohydrates, protein, and produce serves recovery better.

For more detailed guidance on specific situations, our wellness guide covers a wide range of nutrition and health topics.

Dehydration Warning Signs and When to See a Doctor

Most everyday colds, sore throats, and stomach bugs improve on their own with rest and fluids. But some symptoms mean you should stop self-managing and get medical care. Contact a healthcare provider, or seek urgent care, if you or someone you are caring for has any of the following.

Signs of dehydration to watch for include intense thirst, a dry mouth, little or no urine or urine that is dark, dizziness or lightheadedness, fatigue or weakness, and, in more severe cases, confusion, a rapid heartbeat, or sunken eyes. In infants and young children, watch for a dry mouth and tongue, no wet diaper for several hours, crying without tears, sunken eyes or a sunken soft spot, and unusual sleepiness or irritability. Severe dehydration is a medical emergency.

Call a clinician or seek care if:

• You cannot keep any fluids down for an extended period, or vomiting or diarrhea lasts more than a couple of days.
• You have a high fever, or a fever that lasts more than about three days or keeps returning.
• You notice signs of dehydration that are not improving with fluids.
• You have severe abdominal or chest pain, a stiff neck with a severe headache, trouble breathing, or confusion.
• There is blood in vomit or stool, or black, tarry stools.
• Symptoms are getting worse instead of better, or you have a weakened immune system, are pregnant, are very old or very young, or have a chronic condition that raises your risk.

For infants, older adults, pregnant people, and anyone with a serious underlying condition, err on the side of contacting a clinician sooner rather than later. When in doubt, call your provider’s office or a nurse line for guidance.

Frequently Asked Questions

Should you eat when you have no appetite while sick?

Yes, but do not force it. Even small amounts of nutrient-dense food help your body cope with illness. Try sipping broth, nibbling crackers, or eating a few bites of banana. If solid food feels impossible, prioritize fluids and try again later. A short period of eating less is usually fine, but persistent inability to eat or drink is a reason to check in with a clinician.

Is the “feed a cold, starve a fever” advice accurate?

Not really. Your body needs fluids and nutrition to cope with any illness, whether it involves a cold or a fever. Eat when you feel able, regardless of whether you have a fever. What matters more is staying hydrated and choosing foods your body can tolerate. Deliberately starving yourself during a fever is not helpful.

What should you drink when sick?

Water is always a good baseline. Warm fluids like herbal tea and broth are especially soothing for respiratory illnesses and help thin mucus. Oral rehydration or electrolyte beverages are important if you are losing fluids through fever, sweating, vomiting, or diarrhea. Go easy on excessive caffeine and alcohol, both of which can contribute to dehydration.

How soon after vomiting should you try to eat?

Give your stomach a little time to settle, then start with small sips of clear fluids such as water, an oral rehydration solution, or flat ginger ale. If you can keep fluids down, try a few bites of bland food like crackers or dry toast, and gradually increase the amount as your stomach allows. If you cannot keep fluids down at all, contact a clinician.

Are electrolyte drinks better than water when sick?

It depends on how much fluid you are losing. For a mild cold, water and other everyday fluids are usually enough. When vomiting, diarrhea, or a high fever cause heavier losses, oral rehydration solutions or electrolyte drinks help replace both water and the salts your body needs, which plain water alone does not provide.

The Bottom Line

What to eat when sick depends on your specific illness, but the fundamentals stay the same: prioritize fluids, choose gentle and nutrient-rich foods, include some protein to support recovery, and listen to your body’s appetite signals. Broth, bananas, ginger, honey (for anyone over 12 months), yogurt, and soft cooked foods are versatile options that work across many types of illness. Do not force large meals; small, frequent eating keeps your energy up without overwhelming your system. And know the warning signs, such as inability to keep fluids down, dehydration, high or persistent fever, or worsening symptoms, that mean it is time to contact a healthcare provider.

Sources

• Centers for Disease Control and Prevention (CDC) — hydration, oral rehydration, and food safety guidance
• Mayo Clinic — cold, influenza, gastroenteritis, and dehydration information
• MedlinePlus (U.S. National Library of Medicine / NIH) — vitamin C, zinc, and self-care during common illnesses
• USDA MyPlate — general nutrition and food group guidance
• American Academy of Pediatrics (HealthyChildren.org) — feeding during stomach illness and infant honey safety