What is a bony bump on the left side of head no pains it has been there for five years?

It is difficult to determine the exact nature of the bony bump on the left side of your head without a proper medical examination. However, it is important to mention that any persistent bony growth or bump should be evaluated by a healthcare professional to rule out any underlying medical conditions. While it may have been present for five years without causing any pain, it is still advisable to seek medical advice to ensure your safety and well-being.

Here are a few possible explanations for what the bony bump could be:

1. Exostosis: This refers to a benign bone growth that develops on the surface of a bone. Exostoses are usually painless and do not cause any symptoms unless they press on nearby nerves or structures.

2. Osteoma: Osteomas are benign bone tumors that arise from the bone tissue itself. They are typically small, hard, and painless, and do not require treatment unless they cause functional problems or discomfort.

3. Fibroma: A fibroma is a benign tumor that develops from fibrous connective tissue. It can occur in various parts of the body, including the skull. Fibromas are usually painless and slow-growing, but may require treatment if they cause cosmetic concerns or interfere with function.

4. Sebaceous cyst: A sebaceous cyst is a noncancerous growth that forms when a sebaceous gland becomes blocked. It can appear on any part of the body, including the scalp. Sebaceous cysts are usually soft, movable, and painless unless they become infected.

5. Other causes: In rare cases, a bony bump on the head could be a sign of a more serious underlying condition, such as a bone infection (osteomyelitis), a tumor, or a developmental abnormality.

It is important to consult with a healthcare professional, such as a doctor or dermatologist, to accurately diagnose the cause of the bony bump and determine the appropriate course of action. They may recommend further evaluation, such as imaging tests or a biopsy, to confirm the diagnosis and rule out any potential health concerns.