I hit my head 3 yrs ago, it formed a bump on my forehead, made of bone (right side). Can this be removed by a surgeon? (photos)

The bump is likely "bone scar tissue", which acts like osteoma or bone growth.  This can be shaved or drilled or filed down through small incisions behind the hairline.

It’s understandable to feel self-conscious about a bump on your forehead, especially one that has been persistent for three years. If the bump is indeed a bony growth resulting from your head injury, a consultation with a surgeon, particularly a specialist in plastic or craniofacial surgery, can provide clarity on your options. Surgical removal is often possible, especially if the bump is causing discomfort or impacting your self-esteem. A thorough examination, possibly including imaging studies, will help determine the best course of action tailored to your specific situation. It’s important to discuss your concerns with a qualified healthcare professional to explore the safest and most effective solutions.

Forehead osteomas and lipomas represent a common benign lesion found on the forehead.  When visible, it can be distressing to the patient.  While there are a variety of methods to remove these lesions, endoscopic approach with a single incision is the best.  I utilize a small incision with specialized instruments specific for osteoma removal of the forehead, which allows me to perform this procedure comfortably in an in-office setting.  Many patients can return to work in days rather than weeks with an incision conveniently hidden in the scalp.  

Thanks for your question. Exostosis is a benign bony growth that can occur due to various factors, including genetics, chronic irritation, or unknown causes.
In injury-Induced Bone Growth a severe head injury can trigger abnormal bone growth as the body attempts to repair the damaged tissue. In some cases, this can lead to the formation of a bony growth, although this is relatively rare.
If the injury causes persistent inflammation or irritation to the bone, it can stimulate excessive bone growth, leading to exostosis. Some individuals may have a genetic predisposition to develop exostosis and a head injury could potentially trigger this genetic tendency.
Treatment for exostosis often depends on its location, size, and whether it's causing any symptoms.

The main alternatives for therapy are as follows:

Observation: If the exostosis is minor with little symptoms, we could advise just keeping an eye on it or using conservative measures like pain management with over-the-counter medications like acetaminophen or ibuprofen if the bony protrusion causes discomfort.
Surgery could be suggested if conservative measures are ineffective or if the exostosis is seriously affecting your look or giving you discomfort.
The main surgical methods for eliminating a forehead exostosis are as follows:
Excision Directly
Using specialized equipment, a direct incision is made over the exostosis or in the hairline around it. The bony growth is gently removed, and the wound is then closed.
Endoscopic Surgery:
A minimally invasive technique involving small incisions. A tiny camera and surgical instruments are inserted through these incisions.The exostosis is removed with precision, resulting in minimal scarring.
A Board Certified Plastic Surgeon should examine you to determine the size, position, and form of the exostosis in order to choose the best surgical procedure.
Hope this was helpful!
Best wishes,
Dr Ali Sajjadian
TRIPLE Board Certified Plastic Surgeon

Forehead bump treatment can be removed IF it is thickening of the bone as shown on MRI. See a surgeon who is experienced with this surgery.