Irritated greasy wrinkled forehead. 19 years old. when on the sun the forehead skin slightly stings and redness may appear. also have pimples.

Long shots: You need to manage your acne like an informed adult. Topical benzoyl peroxide is your best friend and your physician can add a prescription strength Rx if needed. Skin sensitivity on sunlight raises the possibility of a porphyria or some other illness; even mild variants of xeroderma pigmentosum can present in older folks. You'd do well to get seen by a skin specialist.