What causes acne on Forehead?

Acne on Forehead and Hairline

Acne on the forehead or near the hairline is typically caused by oils in your hair or hair products.
If you have a fringe, oils from your hair may spread ,settle onto your skin and cause clogged pores.

For men, sweat and perspiration causes hair wax or gel to trickle down to your forehead , causing clogged pores.