- By the dedicated team of editors and writers at Newsletter Station.
Nobody enjoys getting sick, and respiratory or other infections can sometimes seem to appear out of nowhere. However, your body may provide subtle clues before symptoms become more noticeable. Recognizing these early signs can help you slow down, prioritize rest, take precautions around others, and seek medical advice when appropriate.
Keep in mind that these symptoms aren't specific to one illness. Colds, flu, COVID-19, allergies, stress, dehydration, and other conditions can cause similar symptoms. Paying attention to changes in how you feel is helpful, but symptoms alone can't always identify the cause.
Here are some common signs that you may be coming down with an illness.
Unusual Fatigue
Feeling more tired than usual can be an early sign that something is affecting your body. During an infection, your immune system becomes active, and the resulting inflammatory response can contribute to fatigue.
If you suddenly feel unusually exhausted, permit yourself to slow down. Getting adequate sleep, staying hydrated, and avoiding strenuous activity may help your body recover.
Persistent or unexplained fatigue, however, can have many causes and should be discussed with a healthcare professional if it continues.
Sore or Scratchy Throat
A scratchy, dry, or sore throat is a common early symptom of several respiratory infections. It can also result from allergies, dry air, postnasal drip, or other irritants.
Staying hydrated, drinking warm liquids, and using a humidifier may help soothe throat irritation. Gargling with warm salt water can also provide temporary relief for some adults.
If your sore throat is severe, lasts several days, or is accompanied by difficulty swallowing or breathing, seek medical advice.
Runny or Stuffy Nose
A runny or congested nose can signal the beginning of a cold or other respiratory infection. Allergies can produce similar symptoms, so consider whether you have also experienced itching, watery eyes, or a predictable seasonal pattern.
Saline nasal sprays or rinses may help relieve congestion. Drinking fluids and using humidified air can also help ease nasal symptoms.
If congestion is severe or lasts longer than expected, check with a healthcare professional.
Sneezing or Coughing
Frequent sneezing or a new cough can be an early indication of a respiratory infection, although allergies and environmental irritants can cause them as well.
If you're coughing or sneezing, cover your mouth and nose with a tissue or your elbow and wash your hands regularly. When you're experiencing symptoms of a contagious illness, staying home when possible and avoiding close contact with vulnerable people can help reduce transmission.
A persistent, severe, or worsening cough warrants medical attention.
Body Aches and Chills
Muscle aches, joint discomfort, chills, or a general feeling of being "run down" can occur with viral infections, particularly influenza and other respiratory illnesses.
Rest and adequate fluid intake can help support recovery. Depending on your health history, over-the-counter pain or fever medications may provide relief, but always follow the product directions and check with a healthcare professional or pharmacist if you're unsure whether a medication is appropriate for you.
Fever
A fever is one of the body's responses to infection and can occur with many different illnesses. It doesn't necessarily mean that an illness is serious, but the overall pattern of symptoms matters.
If you develop a fever, rest and drink plenty of fluids. Follow appropriate temperature-monitoring and medication guidance, particularly for children, older adults, or people with underlying health conditions.
Seek medical advice if a fever is particularly high, persistent, recurrent, or accompanied by concerning symptoms.
Changes in Appetite
It's common to have less interest in food when you're not feeling well. Nausea, fatigue, congestion, fever, or changes in taste and smell can all affect your appetite.
Don't force yourself to eat large meals if you aren't hungry. Instead, focus on staying hydrated and choosing small, nutritious meals or snacks as tolerated.
If you cannot keep fluids down or have signs of dehydration, contact a healthcare professional.
Digestive Problems
Not every illness starts with respiratory symptoms. Nausea, vomiting, diarrhea, stomach cramps, or a reduced appetite can accompany gastrointestinal infections and some other illnesses.
When experiencing digestive symptoms, replacing lost fluids is particularly important. Small, frequent sips of water or an appropriate oral rehydration solution may be easier to tolerate than drinking large amounts at once.
Seek medical attention for severe abdominal pain, blood in the stool or vomit, significant dehydration, persistent vomiting, or symptoms that don't improve.
Headaches
Headaches can accompany infections and may also be related to dehydration, poor sleep, congestion, stress, or fever.
Resting in a quiet environment and drinking enough fluids may help. If congestion is contributing to the headache, addressing nasal symptoms may provide additional relief.
A sudden, extremely severe headache or a headache accompanied by neurological symptoms, confusion, fainting, or other serious symptoms requires prompt medical evaluation.
Changes in Sleep
Your sleep patterns may change when your body is fighting an illness. You may feel unusually sleepy and need more rest, or congestion, coughing, discomfort, or stress may make it harder to sleep.
Rather than pushing through exhaustion, prioritize rest when you're sick. Keep your bedroom comfortable, maintain a regular sleep schedule when possible, and give yourself time to recover.
What Should You Do If You Think You're Getting Sick?
Recognizing symptoms early doesn't necessarily mean you can prevent an illness from developing, but it can help you respond appropriately.
Consider:
Getting extra rest instead of pushing through exhaustion.
Drinking plenty of fluids to help prevent dehydration.
Eating nutritious foods as your appetite allows.
Washing your hands regularly to reduce the spread of germs.
Avoiding close contact with others when you're experiencing symptoms of a potentially contagious illness.
Considering testing when appropriate based on your symptoms and current public health guidance.
Following recommended vaccinations to reduce the risk of certain infections and severe illness.
When Should You Contact a Healthcare Professional?
Many mild illnesses improve with rest, fluids, and time. However, don't hesitate to contact a healthcare professional if symptoms are severe, worsening, persistent, or unusual for you.
Seek urgent medical attention for serious symptoms such as difficulty breathing, chest pain or pressure, severe dehydration, confusion, fainting, or a sudden severe headache. For children, older adults, pregnant individuals, and people with certain chronic health conditions, it's especially important to seek professional guidance when symptoms develop.
Listen to Your Body
Feeling tired, developing a scratchy throat, or noticing a change in appetite doesn't necessarily mean you're about to become seriously ill. These symptoms can have many different causes.
Still, paying attention to changes in your health allows you to slow down, take sensible precautions, and monitor how you're feeling. Getting adequate rest, staying hydrated, practicing good hygiene, and following recommended preventive care can all support your overall health.
Most importantly, know when symptoms require professional attention. When in doubt, it's better to consult a qualified healthcare professional than to ignore worsening symptoms.
