Norovirus Symptoms You Should Know to Look For

Norovirus is a highly contagious virus that causes gastroenteritis, also known as the stomach flu. It leads to inflammation of the stomach and intestines, resulting in vomiting, diarrhea, and dehydration.

While most cases are short-lived, norovirus can be more serious for infants, older adults, and people with weakened immune systems. Early recognition and proper care are key to recovery and preventing the spread.

Common Norovirus Symptoms

Norovirus symptoms usually begin suddenly and can be intense. They often include:

• Nausea and vomiting
• Watery diarrhea
• Low-grade fever
• Stomach cramps or pain
• Muscle aches
• Headache
• Fatigue

Symptoms typically last 1–3 days, but some people may feel unwell longer. If you or your child can’t keep fluids down or symptoms worsen, seek medical attention to avoid dehydration.

What Causes Norovirus?

Norovirus is spread by contact with:

• Contaminated food or water
• Surfaces touched by infected individuals
• Direct contact with someone who is sick

It’s often called the “winter vomiting bug” but can occur any time of year—especially in crowded places like schools, hospitals, and nursing homes.

Dehydration: The Most Serious Risk

The biggest danger with norovirus is dehydration, especially in young children and older adults.

Signs of dehydration include:

• Dry mouth or lips
• Dizziness or lightheadedness
• Few or no tears when crying (in children)
• Decreased urination or dark urine
• Sleepiness or irritability

To stay hydrated:

• Sip water or oral rehydration solutions frequently
• Avoid sugary or caffeinated drinks
• Begin eating small, bland meals again as soon as possible

Treating Norovirus at Home

There’s no specific antiviral medication for norovirus. Treatment focuses on managing symptoms and preventing dehydration.

Tips for home care:

• Rest as much as possible
• Drink small amounts of fluid regularly
• Wash hands often with soap and warm water
• Avoid preparing food for others until fully recovered

Most people recover at home within a few days. Seek medical care if symptoms worsen or dehydration is suspected.

How to Prevent Norovirus from Spreading

Norovirus spreads quickly—follow these steps to protect your family and others:

• Wash hands thoroughly, especially after using the bathroom or changing diapers
• Disinfect surfaces (especially bathrooms) with bleach-based cleaners
• Do not share towels, utensils, or bedding
• Wash soiled clothes and linens separately in hot water
• Stay home from work, school, or daycare for at least 48 hours after symptoms stop

When to Call a Doctor

You should contact your healthcare provider if:

• You or your child show signs of moderate or severe dehydration
• Vomiting or diarrhea lasts more than 3 days
• You have a high fever or bloody stool
• You suspect exposure in a high-risk environment (e.g., daycare, senior facility)

Expert Norovirus Care at BASS Medical Group

If you or your child is experiencing symptoms of norovirus, BASS Medical Group can help. Our experienced team of primary care physicians and pediatric providers can guide you through symptom management and ensure you stay hydrated and safe.

Get fast, expert care in Walnut Creek, Concord, and throughout the Bay Area.

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