Greetings. These are keloids probably due to trunkal acne. The standard treatment of keloids includes intra lesional injections and silicone gel application/ silicone cream application. The lesions will slowly flatten but may not get cured completely with any treatment. Fractional laser therapy is another option. Kindly see a dermatologist near you and discuss the same with him. You'll also need oral retinoids for a short course under dermatologist's guidance. Warm regards, Dr Govind S Mittal.