How can I get rid of this hole in my forehead? (Photo)

Thank you for your question and photo.  The small pit in the skin on your forehead may be treated by excision.  You may trade the pit for a small scar that will likely be hardly noticeable after proper healing.  If it bothers you, I recommend you seek a consultation with a board certified facial plastic surgeon or plastic surgeon.

The hole is either a scar (e.g. chicken pox scar) or something called a dilated pore of Winer. The best treatment would be a simple punch excision, and you'd trade a hole that can't be covered for a tiny thin white line that can be easily covered with makeup if need be. You must see a specialist physician (e.g. derm, plastics) for this to optimize results and safety.