Acne occurring on only one side of the face and coming back after stopping treatment is usually due to ongoing triggers such as hormonal imbalance, repeated friction (like mobile phone use, pillow contact, helmet straps), oily skin, or incomplete/short-duration treatment, especially with medicines like Acutret 20 Capsule, which require a full prescribed course to give lasting results. Temporary improvement followed by recurrence is common if maintenance therapy is not continued. For long-term control, dermatologists usually recommend a combination approach; topical treatments such as Adapalene or Benzoyl Peroxide to keep pores clear, along with lifestyle measures like gentle cleansing, avoiding oily products, not touching or squeezing the face, and keeping items like phones and pillowcases clean. If acne is persistent or severe, a properly monitored longer course of oral treatment or hormonal evaluation may be needed. It is best to follow up with a dermatologist for a tailored plan, as consistent treatment and maintenance are key to preventing recurrence.