Thanks for writing.
Presence of acne in middle age group is known as adult onset acne. It is mainly due to hormonal imbalance or due to use of greasy cosmetics, oils or face massages.
Use a salicylic acid
face wash and apply adapalene clindamycin
combination in night. If the lesions start subsiding in a week or two then continue with same other wise meet a dermatologist
. In your case blood test
to rule out hormonal disorder and ultrasound uterus and adenexa might be required.
Hope this helped.