7 Most Common Norovirus Symptoms

2. Abdominal Cramping and Pain

You often feel abdominal cramping and pain when norovirus irritates your stomach and intestines. The virus causes swelling inside your gut, which leads to tight, squeezing feelings. This pain can start suddenly and may come and go throughout the day.

You may notice the pain feels worse before or during diarrhea or vomiting. Your body tries to push the virus out, and that process can trigger cramps. The pain often sits around the middle of your belly, but it can spread to other areas.

This type of pain may present as sharp or squeezing cramps, a dull and constant ache, discomfort that eases after using the bathroom, or tenderness when pressing on the stomach. You might also feel bloated or full, even if you have not eaten much. Gas can build up as your digestion changes in response to the infection. These changes make your stomach feel tight and uncomfortable.

3. Diarrhea or Watery Stools

Diarrhea is one of the most common signs you may notice with norovirus. Your stools often turn loose or watery and happen many times a day. This change can start fast and feel hard to control. You may need to use the bathroom often, sometimes every hour. Each episode removes a lot of fluid from your body. This fluid loss can add up quickly, especially if vomiting also occurs.

The virus irritates your gut, causing your intestines to stop absorbing water the right way. Instead, extra fluid moves through your system and exits as diarrhea. You may notice stomach cramps before or during bowel movements. They usually ease for a short time after you use the bathroom. Frequent diarrhea raises your risk of dehydration. Children and older adults can lose fluids faster and may show signs sooner.

4. Low-Grade Fever

A low-grade fever often appears when you have norovirus. You may notice your body temperature rise slightly as your immune system reacts to the infection. This fever usually starts within one to two days after exposure. You may feel warm, flushed, or chilled at the same time. The fever often comes with other symptoms like stomach pain, nausea, or body aches. These signs can make you feel tired and weak.

This type of fever stays mild for most people. It may come and go during the first few days of illness. Many people see the fever fade as vomiting and diarrhea improve. Your body uses the fever as a tool to fight the virus.

Fever can add to fluid loss when you also have vomiting or diarrhea. This makes drinking fluids important, even if you do not feel thirsty. Children, older adults, and people with ongoing health issues may feel the effects more strongly.

5. Chills

Chills can happen with norovirus, though they are not always the first symptom you notice. You may feel sudden shivering or shaking, even when the room feels warm. This reaction can feel strong and uncomfortable. Your body causes chills as it tries to raise its temperature. This often happens when a mild fever begins or when your immune system responds to the virus. You might notice chills start before or during vomiting or diarrhea.

Chills often come and go in short waves. You may feel cold, then warm, then cold again. You may also notice chills along with body aches or a headache. These symptoms can make it hard to rest. Sleep may feel incomplete, and you may wake up feeling shaky or sweaty. As your body clears the virus, the shaking often fades. Drinking fluids and resting can help you feel more stable while chills pass.

6. Headaches

You may notice headaches during a norovirus infection, even though the illness mainly affects your stomach and intestines. These headaches often feel dull or steady rather than sharp. They can start soon after other symptoms like nausea or vomiting.

Fluid loss from diarrhea or vomiting can trigger headaches. When your body loses water, your brain can react with pain. Fever and body aches can also add pressure and discomfort in your head. You may feel the headache more when you stand up or move around. Light and noise can feel irritating during this time. Fatigue from poor sleep or low energy can make the pain feel stronger.

These headaches usually appear with other symptoms, not on their own. As your stomach symptoms change, the head pain may also change in strength or timing. The headache often fades as your body regains balance and energy. For most people, this type of headache does not last long.

7. Generalized Body Aches

Norovirus can cause generalized body aches, which often feel dull and spread out rather than sharp or focused. You may notice soreness in your arms, legs, back, or neck as your immune system fights the virus. Fever and chills, which sometimes occur with norovirus, can add to this discomfort.

When your body reacts to the infection, your muscles feel sore. You might feel body aches at the same time as stomach symptoms. In some cases, the aches start early and fade as vomiting or diarrhea becomes more intense. For others, muscle pain appears later and lasts a short time.

Body aches from norovirus usually affect your whole body. They do not stay in one joint or muscle group. The pain level ranges from mild to moderate and often changes during the day.