Itchy acne all grouped together hurts to touch looks really red? On the side of my forehead

Acne. Acne on the side of you forehead may be due to exceesive sweating caused by wearing a hat or helmet. Oily shampoo may also be a cause. If you are already using acne medication, stop it for a few days nd apply a moisturizer instead to reduce the redness. Once the redness is gone you can restart acne medication such as benzyol peroxide.You may alsoneed to see a dermatologist if antibiotics have to.
May not be acne. Acne doesn't usually itch or feel so tender, so it sounds like you need to see a doctor ASAP to find out what's going on. Once you know the problem, the doctor can advise on treatment.