My 19 year old daughter is suffering with acne on her face. (2 years now) After trying milder topical gels, GP prescribed oxytetracyline oral antibiotic (500mg twice a day) plus azaelic acid topical). Eight week course and still waiting to see effectiveness. She goes back to Uni in Autumn so no real continuity of GP contact - just medical records when home and away. She is on levothyroxoine following Hashimotos thyroiditis 4 years ago.
Looking at bigger picture, I wonder if it might be hormonal cause - perhaps elevated androgens. Maybe she should have a blood test before she goes away and gets referred to a dermatologist before she goes away again? Maybe Polycystic ovaries too although no other symptoms.