What Are the Symptoms of Valley Fever? When to Seek Help

Valley fever symptoms often include extreme fatigue, a dry cough, fever, shortness of breath, night sweats, headache, muscle aches or joint pain, chest discomfort, and a rash on the upper body, legs, or shins. If you experience these symptoms – especially if they persist beyond a week or worsen – you should seek medical help to rule out valley fever and receive appropriate care.

Living in Phoenix, Scottsdale, or nearby communities means dust is part of daily life, and our providers are experienced in evaluating complex, overlapping symptoms for patients across the Valley.

What Is Valley Fever?

Valley fever, medically known as coccidioidomycosis, is a fungal lung infection caused by inhaling Coccidioides spores that live in dry desert soil across the American Southwest, including Arizona, Maricopa County, and the Phoenix Valley. It is not a typical respiratory infection like a cold; it can look like the flu, walking pneumonia, or COVID-like fatigue.

Common Symptoms of Valley Fever

Symptoms range from mild to severe and often overlap with those of the flu, COVID-19, bacterial pneumonia, or other conditions. It often starts like a viral illness and lasts longer than a typical cold or flu.

Early Symptoms

Common early symptoms include:

• Tiredness or overwhelming fatigue that feels out of proportion to a simple cold

• Dry cough, or a cough with phlegm or a small amount of mucus

• Fever (low-grade or high) and chills

• Night sweats that soak a shirt or sheets

• Headache, mild or severe

• Chest pain or tightness, from a mild ache to sharp, stabbing pains that worsen with a deep breath

• Shortness of breath with exertion or normal activity

• Muscle aches

• Joint pain, often in the knees, ankles, or wrists

• Joint swelling, even when the cough is mild

• Sore throat

• Poor appetite

• A painful red rash, often on the shins; some people also notice lumps under the skin or a patchy rash on the chest or upper body

These symptoms can appear together or one at a time – you might have fever and fatigue without much cough, or a stubborn cough with almost no fever. If you already live with arthritis and joint pain, mention new or sharper joint symptoms, and if a flu-like illness lingers, scheduling a sick visit is a critical first step.

Ongoing or Persistent Symptoms

A typical viral cold improves within a few days, but Valley Fever can leave you exhausted for weeks or even months. This is where internal medicine expertise becomes invaluable for managing long-term wellness.

Ongoing symptoms may include:

• Prolonged fatigue and low energy that does not improve with sleep; you may feel well enough to work, then crash at night

• A chronic cough that hangs on for weeks or months after the fever is gone

• Low-grade temperature in the afternoon or evening

• Night sweats that continue

• Weight loss from poor appetite

• Brain fog or trouble concentrating

• Reduced exercise tolerance

• Joint pain, often called “desert rheumatism,” with pain and swelling in the ankles, knees, and other joints that may flare with activity

• Rash (erythema nodosum): painful red bumps, most often on the shins—a good sign, as it indicates a strong immune response to the fungus

If your symptoms last beyond 7 to 10 days or you improve and then slide backward, get checked rather than wait it out.

Severe or Complicated Valley Fever Symptoms

Most cases stay in the lungs and slowly improve. For a small percentage of people, the infection can become severe, cause pneumonia, or spread outside the lungs (disseminated coccidioidomycosis) to the skin, bones, joints, or the covering of the brain (meningitis).

This is meant to help you notice when “wait and see” is no longer the safe plan.

Signs of Serious Infection

Signs that the infection has become severe can include:

• Fast or worsening shortness of breath, or difficulty breathing

• Chest pain that is severe or constant

• Coughing up blood

• A fever that stays high or returns after it broke

• Chronic pneumonia that does not improve with standard antibiotics

• Skin sores, ulcers, lesions that do not heal, or draining bumps

• Painful, swollen joints

• Swollen lymph nodes in the neck or under the arms

• Severe and persistent headaches that are different from your usual headaches, stiff neck, confusion, or sensitivity to light (symptoms of meningitis)

• Weakness, fainting, or a sudden drop in how well you function

These symptoms are a medical emergency; seek help immediately to prevent more serious complications.

Diagnosis and Testing for Valley Fever

Diagnosis starts with your history, a physical exam, and the right tests, because valley fever is often missed at first; our providers are trained to diagnose complex conditions. Phoenix Internal Medicine offers convenient on-site phlebotomy, so many blood tests can be drawn in the office.

Evaluation and testing may include:

• A review of symptoms, dust or soil exposure, travel history, and other health conditions

• Listening to the lungs, checking oxygen level, and looking for rashes or other signs of infection

• Serology (blood test) that looks for antibodies to the Coccidioides fungus and can confirm a current or recent infection

• Sputum smear or culture, if you have a productive cough, so phlegm can be examined under a microscope or cultured for the fungus

• Imaging such as a chest X-ray or CT scan to look for pneumonia or other lung changes

• Other labs to look at inflammation, blood counts, or related problems

One blood test is not always the whole story – early results can be negative and later turn positive – so your provider may repeat testing, review imaging, or refer you to a specialist. Our team helps manage referrals and review results, so care stays connected.

Managing and Treating Valley Fever Symptoms

Treatment depends on how sick you are, how long you have been ill, and your overall health. Many healthy people with mild cases recover without medication, though it may take months; management then focuses on rest, hydration, and over-the-counter medicines for fever and pain.

There is no routine vaccine that prevents valley fever – awareness, dust control, and prompt care when symptoms linger are the tools that help most.

Plan a follow-up if:

• You were diagnosed and started on antifungal medicine

• Your fever lasted more than a few days

• You have diabetes, asthma, heart disease, or immune-system concerns

• Night sweats, weight loss, or chest pain continue

• You felt better, then symptoms returned

• A first blood test was negative, but you are still sick

• Fatigue and cough trail behind even after you feel a little better

Bring notes about energy, appetite, cough, and any new rashes or joint swelling, and ask whether a repeat study is needed if imaging was done.

Conclusion

Valley fever can look like a routine respiratory illness at first, but symptoms that persist, worsen, or return deserve medical attention. If you have ongoing fatigue, cough, fever, night sweats, shortness of breath, chest discomfort, joint pain, or a persistent rash – especially after exposure to dust or soil in Arizona – talk with a healthcare provider about whether Valley fever testing is appropriate. Early evaluation can help distinguish Valley fever from other conditions and ensure you receive the right care and follow-up.