What causes bumps on your head?

Bumps on the head can have various causes, here are some common reasons:

1. Trauma: Direct impact or injury to the head, such as from falls or collisions, can cause bumps or swellings.

2. Benign Growths: Non-cancerous growths, like bumps or cysts on the scalp, can develop due to genetic factors, hormonal changes, or other unknown causes.

3. Skin Conditions: Certain skin conditions, such as acne or folliculitis (inflammation of hair follicles), can lead to bumps on the head.

4. Insect Bites or Stings: Bites from insects like mosquitos, spiders, or bees can cause raised bumps or welts on the scalp.

5. Allergic Reactions: Allergic reactions to certain foods, medications, or environmental triggers can lead to swelling and bumps on the head.

6. Infections: Bacterial, viral, or fungal infections of the scalp can cause bumps, itching, and discomfort. Common infections include ringworm (fungus) and impetigo (bacteria).

7. Cysts: Sebaceous cysts or epidermal inclusion cysts can develop on the scalp and appear as bumps. They are usually harmless and can be removed by a dermatologist if needed.

8. Medical Conditions: Certain medical conditions, such as autoimmune diseases (e.g. Lupus) or cancer, can cause bumps on the head as part of their symptoms.

9. Foreign Bodies: In some cases, bumps on the head may be caused by foreign objects becoming lodged in the scalp, such as thorns or splinters.

10. Birthmarks: Some people may have bumps on their head due to birthmarks, like hemangiomas (red, raised birthmarks) or nevi (moles).

If you notice a sudden or persistent bump on your head, it is advisable to consult a doctor or dermatologist for an accurate diagnosis and appropriate treatment. Some bumps may be harmless, but others may require medical attention.