Plain-language basics to help you understand symptoms, exposure, testing, and when to seek care.
Valley Fever is a fungal infection caused by breathing in microscopic spores from disturbed soil in endemic regions of the Southwest, including parts of California.
People usually become infected after breathing in fungal spores that become airborne when dirt or dust is stirred up by wind, digging, construction, or outdoor activity.
Doctors may use blood tests, imaging, and clinical history. Treatment varies, but some patients need antifungal medication and follow-up care.
A simple overview of how exposure happens and what signs to watch for.
Fungal spores can become airborne when dirt or dust is stirred up by wind, digging, construction, or outdoor activity.
People usually become infected after breathing in spores. The lungs are typically the first place affected.
If symptoms linger or worsen, especially after dust exposure in California, ask a doctor whether Valley Fever testing is appropriate.
Fever
Fatigue
Cough or shortness of breath
Headache
Joint or muscle pain
Rash
Consider medical evaluation if you have ongoing flu-like or respiratory symptoms after dust exposure, symptoms that last more than a week or two, or symptoms that are getting worse instead of better.
Visit our Resources page for Sacramento-area doctors, UC Davis Valley Fever information, and support organizations.
This page is for educational purposes only and is not a substitute for medical advice, diagnosis, or treatment.
