Fever
Fever is a sign your body is fighting illness. Learn common causes, when urgent care can help, and emergency warning signs — including guidance for children.
Possible causes
What qualifies as a fever: A fever is generally a body temperature of 100.4°F (38°C) or higher when measured orally, rectally, or by another reliable method. Context matters — the same number can mean different things in infants, children, and adults.
Staying hydrated with fever: Fever increases fluid loss through sweating. Drink water or electrolyte fluids regularly, and watch for signs of dehydration — dry mouth, reduced urination, dizziness, or inability to keep fluids down. Seek prompt care if dehydration is a concern.
Fever itself is not a diagnosis — it signals an underlying issue. Common causes include:
- Viral infections (cold, flu, COVID-19, RSV)
- Bacterial infections (strep throat, ear infection, UTI, pneumonia)
- Inflammatory or immune responses
- Heat exhaustion (environmental)
- Recent vaccinations (mild, short-lived fever can be normal)
Commonly associated symptoms
Depending on the cause, fever may occur with:
- Chills or sweating
- Body aches and fatigue
- Sore throat, cough, or congestion
- Headache
- Nausea or vomiting
- Ear pain or painful urination (suggesting a localized infection)
When urgent care may be appropriate
When urgent care may help: Consider evaluation if fever lasts more than a few days, is accompanied by significant symptoms, or you need testing to identify the cause (flu, COVID-19, strep, or other infections).
How NeuMed evaluates fever: A provider reviews your history and exam, then may recommend rapid testing when clinically appropriate — often during the same visit at Houston-area clinics.
Testing options: Rapid flu, strep, and COVID-19 tests may be available depending on your symptoms. Results timing varies by test type and clinic workflow.
Treatment depends on diagnosis: Viral illnesses are usually managed with rest, fluids, and symptom relief. Bacterial infections may need antibiotics. Antivirals for flu may be considered when started early and clinically appropriate.
Pediatric considerations: Infants under 3 months with any fever need emergency care — not urgent care. For older children, seek prompt evaluation for persistent high fever, dehydration, breathing difficulty, or if your child appears very ill. NeuMed treats children 6 months and older.
When to seek emergency care
Call 911 or go to the emergency room for:
Difficulty breathing or blue lips/face
Severe chest pain or confusion
Stiff neck with fever and severe headache
Signs of severe dehydration (no urination, dizziness, lethargy)
Seizure with fever
Any fever in an infant under 3 months old
FAQs
What temperature counts as a fever?
A fever is generally considered a body temperature of 100.4°F (38°C) or higher. Context matters — the same number can mean different things in infants, children, and adults.
Should I go to urgent care for a fever?
Consider urgent care when fever is persistent, very high, accompanied by concerning symptoms, or you are unsure whether emergency care is needed. Infants under 3 months with any fever need emergency evaluation.
Can NeuMed test for flu or COVID with a fever?
Yes. When clinically appropriate, NeuMed can perform rapid flu, strep, and COVID-19 testing during your visit at Houston-area clinics.
Related conditions
Related symptoms
Related services
- Cold & Flu Having the cold or flu can leave you not feeling well. We at NeuMed strive to get you better fast.
- Flu & Strep Testing If you suspect you have Strep Throat, our medical practice at NeuMed Modern Urgent Care is here to help. Our trained providers near you provides strep throat testing and results in less than 30 minutes.
- COVID-19 Testing We offer fast, easy and reliable COVID testing in Houston — walk-in PCR and rapid tests, quick results, no appointment necessary.
- Pediatric Urgent Care When your child is sick or injured, every minute feels like an hour. At NeuMed Modern Urgent Care + IV Therapy, we understand that you need fast, compassionate care without the chaos of the emergency room. Our pediatric urgent care services combine the efficiency of modern medicine with the warmth your little one deser
- On-Site Lab Services Strep throat? Urinary Tract Infection? Pregnant? We'll put your mind at ease by giving you a test in our on-site lab. We'll also give you choices for treatment or, if necessary, refer you to a specialist.
Related health guides
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Flu vs. Cold: How Can You Tell?
Sudden vs gradual onset, fever, body aches, and when testing helps.
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Flu or COVID-19? Key Differences
How flu and COVID-19 symptoms compare and when testing at urgent care helps.
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RSV vs. Flu: What's the Difference?
How RSV and influenza compare in children and adults.
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How Long Does the Flu Usually Last?
Typical flu timeline, recovery phases, and when to seek care.
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When Should You Go to Urgent Care for a Fever?
Adult and pediatric red flags, dehydration, and when ER care is needed.
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Can Urgent Care Test for the Flu?
What happens during a flu evaluation and rapid testing at urgent care.
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RSV in Children: When to Seek Care
Common RSV symptoms in kids and warning signs that need prompt evaluation.
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