What causes headach es and fevers?

Headaches and fevers are common symptoms that can be caused by a variety of underlying medical conditions. Some of the most common causes include:

1. Infections: Viral and bacterial infections, such as the common cold, flu, and sinusitis, can cause both headaches and fevers.

2. Sinus problems: Inflammation or infection of the sinuses, called sinusitis, can lead to headaches, facial pain, and fever.

3. Allergies: Allergies to pollens, dust mites, pet dander, and other substances can cause allergic rhinitis, which is characterized by sneezing, runny nose, and watery eyes, and can also be associated with headaches and fever.

4. Dehydration: Lack of adequate fluid intake can lead to dehydration, which can cause headaches and sometimes fever.

5. Stress: Emotional stress and tension can trigger headaches and may also contribute to fever.

6. Certain medications: Side effects of some medications, such as aspirin, ibuprofen, and other pain relievers, can include headaches and fever.

7. Underlying medical conditions: Some headaches and fevers may be symptoms of more serious underlying medical conditions, such as meningitis, encephalitis, and brain tumors.

It's important to note that not all headaches and fevers are caused by the same underlying condition. If you are experiencing persistent or severe headaches or fevers, it's important to consult with a healthcare professional for proper diagnosis and treatment.