Onset of acne in adult age usually points towards a hormonal derangement. To get the same confirmed a hormonal work up and a pelvic ultrasound needs to be done. Usually adult onset acne does not respond to topical therapy alone. A course of oral anti acne medicines like azithromycin
needs to be taken along with hormonal pills. The same can only be prescribed after a thorough consultation with dermatologist
. In the meanwhile you can start with these
1) continue using salicylic acid
2) as your skin has become sensitive, use a mild moisturiser and sunscreen. You may use acne moist moisturiser and suncote sunscreen
3) use benzoyl peroxide
2.5 percent( benzac ac gel) in daytime and adapalene gel in night. Apply these medicines only over acne lesions and do not rub the medicine. Too much rubbing or excess application can irritate the skin. Chances of irritation of skin are quite high with benzoyl peroxide 5 percent. So I would not advise you to use it without a proper skin analysis.
4) get your comedones extracted regularly.
Hope that answers your query. Take care.