I have suffering from acne on my skin due to seborrhea dermatitis oily skin, now i thinking to take doxycycline 50mg. what u suggest?

Do you have both?: Heads up. It's common to have both of these; I did most of my teens and young adult life. For seborrhea, ketoconazole shampoo is helpful and there are a variety of others; just avoid steroids. Never use an antibiotic like doxyxycline as sole Rx for acne, but it may be very helpful in combination with topical benzoyl peroxide and/or retinoic acid. The Rx's you're using now are less helpful for this