Most common illnesses like colds and flu resolve on their own, but what you do in the first few days makes a real difference in how long you feel miserable. The basics are straightforward: sleep as much as possible, drink more fluids than usual, and give your body the conditions it needs to fight off the virus. Here’s how to do each of those things well.
Why Sleep Is Your Best Medicine
Your immune system ramps up its strongest defenses while you sleep. During deep sleep, your body increases production of key signaling proteins called cytokines that coordinate the antiviral response. It also boosts the activity of immune markers involved in fighting off infections. This isn’t a vague “rest helps” platitude. Measurable shifts in immune function happen specifically during sleep that don’t happen when you’re awake and pushing through your day.
When you cut sleep short or sleep poorly, the opposite occurs. Your body suppresses antiviral genes and instead activates inflammatory pathways, the kind that make you feel worse without actually helping you recover. This is why a bad night of sleep during an illness often leads to a noticeably rougher next day. Aim for at least eight to nine hours, and nap during the day if you can. If congestion or coughing keeps waking you, propping yourself up with an extra pillow helps mucus drain rather than pooling in your throat.
How Much Fluid You Actually Need
The standard recommendation is about 9 cups (2.25 liters) of fluids per day for women and 12 cups (3 liters) for men, but when you’re sick you need more than that. Fever, sweating, and mouth breathing all increase fluid loss. If you’re dealing with vomiting or diarrhea, losses climb even faster.
Staying hydrated does more than prevent dehydration. It keeps the mucous membranes in your nose and throat moist enough to function as a barrier against bacteria. It also thins out mucus, which reduces nasal irritation from all the coughing and sneezing. Water is fine, but warm liquids like tea or broth have the added benefit of soothing a sore throat and loosening congestion. If plain water feels unappealing, diluted juice, electrolyte drinks, or even popsicles all count.
A simple way to check whether you’re drinking enough: your urine should be pale yellow. If it’s dark, you’re behind.
Foods That Actually Help
Chicken soup isn’t just comfort food. Researchers at the University of Nebraska Medical Center found that chicken soup inhibits the movement of neutrophils, a type of white blood cell that drives the inflammatory response in upper respiratory infections. In plain terms, it has a mild anti-inflammatory effect that can reduce the severity of cold and flu symptoms. The warm broth also delivers fluids and salt, and the vegetables and protein provide energy your immune system needs to function.
If you don’t have an appetite, don’t force large meals. Small, frequent portions of easy-to-digest foods like toast, rice, bananas, or yogurt keep your energy up without taxing your stomach. The old advice to “starve a fever” has no scientific basis. Your body burns more calories when fighting an infection, so giving it fuel helps.
Honey for Cough Relief
If a persistent cough is keeping you awake, honey is surprisingly effective. A double-blind study found that just 2.5 milliliters of honey (roughly half a teaspoon) before bed reduced cough frequency more effectively than common over-the-counter cough suppressants. Children in the honey group saw their cough frequency scores drop from about 4.1 to 1.9 on a standardized scale, compared to a much smaller improvement in the control group.
You can take it straight, stir it into warm water, or mix it into tea with lemon. One important exception: never give honey to children under one year old due to the risk of botulism.
Saline Rinses and Humidity
Rinsing your nasal passages with salt water is one of the most underrated home remedies. A randomized trial published in the Journal of Global Health found that gargling and rinsing with saline solution four times daily significantly reduced both the frequency and duration of respiratory symptoms. The hospitalization rate among participants using saline rinses was roughly 20%, compared to nearly 59% in the group that didn’t rinse. Other trials have shown saline washes reduce viral load in the nasal passages, meaning they help your body clear the virus faster.
You can use a neti pot, squeeze bottle, or saline spray from any pharmacy. The solution is simple: dissolve about half a teaspoon of salt in eight ounces of warm water. Always use distilled, boiled, or previously boiled water rather than straight from the tap.
Keeping your indoor humidity between 30% and 50% also helps. Dry air irritates inflamed airways and dries out the mucous membranes you need working properly. A cool-mist humidifier in your bedroom can make breathing and sleeping noticeably easier. Clean it regularly to prevent mold growth.
Zinc Lozenges: Timing Matters
Zinc lozenges can shorten a cold, but only if you take enough and start early. A systematic review found that lozenges providing more than 75 milligrams of zinc per day consistently reduced cold duration, while lower doses showed no benefit at all. That typically means dissolving a lozenge every two to three waking hours.
The catch is that zinc works best when started within the first 24 hours of symptoms. If you’re already on day three, the window for benefit has largely closed. Zinc lozenges can also cause nausea or leave a metallic taste, so take them on a non-empty stomach and stop once your symptoms resolve.
Managing Fever and Pain
A mild fever is actually part of your immune response, creating an environment that’s harder for viruses to replicate in. You don’t need to treat every low-grade fever. But if you’re uncomfortable, acetaminophen and ibuprofen are both effective, and combination tablets containing both are available over the counter.
The key safety rule with acetaminophen is to never exceed 4,000 milligrams in 24 hours. This is easier to accidentally surpass than you’d think, because acetaminophen is an ingredient in many cold and flu combination products, cough syrups, and nighttime formulas. Check every label. If you’re using a combination acetaminophen-ibuprofen tablet, the standard adult dose is two tablets every eight hours, with a maximum of six tablets per day.
When You Can Return to Normal Activities
The CDC’s current guidance says you can resume normal activities when both of the following have been true for at least 24 hours: your symptoms are improving overall, and you haven’t had a fever without using fever-reducing medication. Meeting those criteria means you’re typically less contagious, though your body is still clearing the virus for some time afterward. Wearing a mask for a few days after returning to work or school reduces the chance of spreading it to others.
If your fever returns or symptoms worsen after you’ve started feeling better, that’s a signal to stay home again and restart the 24-hour clock.
Warning Signs That Need Medical Attention
Most respiratory illnesses don’t require a doctor’s visit, but certain symptoms signal something more serious. In adults, seek emergency care for difficulty breathing, persistent chest or abdominal pain, confusion or dizziness that won’t resolve, not urinating, severe muscle pain, or seizures. A fever or cough that improves and then comes back worse is also a red flag, as it can indicate a secondary bacterial infection like pneumonia.
For children, watch for fast or labored breathing, bluish lips or face, ribs pulling inward with each breath, refusal to walk due to muscle pain, or signs of dehydration like no urine for eight hours, dry mouth, or no tears when crying. Any fever of 100.4°F or above in a baby under 12 weeks old warrants immediate medical evaluation, as does a fever above 104°F that doesn’t respond to fever-reducing medicine in older children.