Have large squishy type bump on forehead it started out a pea size 8yrs ago now is of half dollar what could be?

It is essential to consult a medical professional for proper evaluation and diagnosis of the bump on your forehead. Without a physical examination and further investigations, it is difficult to determine the exact cause.

However, here are some possible causes of a squishy bump on the forehead:

1. Lipoma: Lipomas are benign growths that commonly occur beneath the skin. They usually feel soft, movable, and painless, and can gradually grow over time.

2. Sebaceous Cyst: Sebaceous cysts arise from blocked oil glands in the skin and contain sebum, a substance produced by these glands. They often appear as round or oval lumps and can gradually increase in size.

3. Pilar Cyst: Pilar cysts develop from ingrown hair shafts or remnants of hair follicles. They typically feel firm or hard and may be movable under the skin.

4. Hematoma: A hematoma is a collection of blood outside of a blood vessel, often resulting from an injury or trauma. If a blood vessel is damaged in the area, it can form a bump that may grow over time.

5. Dermoid Cyst: Dermoid cysts are congenital cysts that contain skin appendages such as hair follicles, sweat glands, and sebaceous glands. They are usually present at birth or develop during childhood.

6. Abscess: An abscess is a localized infection that forms a collection of pus. If an infection occurs in the deep layers of the skin, it can create a fluctuating or squishy lump.

7. Other Conditions: In rare cases, the bump could be related to other conditions such as a tumor or an underlying medical issue.

It is important to note that these are just potential causes, and without proper medical assessment, it is difficult to determine the exact cause. Therefore, it is strongly advised to see a doctor or dermatologist who can examine the bump, gather additional information, and perform any necessary tests to arrive at an accurate diagnosis and appropriate treatment.