What for a 12-year-old for pimples?

First of all, if a 12-year-old has severe acne, it is worth consulting with a dermatologist who will choose effective treatment and care. First of all, you should focus on proper facial hygiene - it should be washed at least once a day at night. Do not wash it too often and use very drying anti-acne cosmetics - this can even worsen the condition of the skin. To wash the face, you can use a delicate cleansing foam for acne-prone skin, e.g.: https://www.gdziepolek.pl/produkty/38666/iwostin-purritin-pianka-oczyszczajaca-pianka/apteki In the morning and evening, use a moisturizing cream for acne-prone skin. Proper skin hydration will help reduce the amount of sebum secreted and thus improve the condition of the facial skin and reduce the number of skin lesions, e.g.: https://www.gdziepolek.pl/produkty/38674/iwostin-purritin-rehydrin-krem-przywracajacy-nawilzenie-krem/apteki For already existing acne lesions, local preparations can be used, which will accelerate their disappearance, reduce size and visibility, e.g.: https://www.gdziepolek.pl/produkty/91767/pharmaceris-t-medi-acne-pointgel-zel-punktowy-na-miejscowe-zmiany-mikrozapalne-zel/apteki In the attached links you can compare the prices of recommended preparations in online pharmacies and place an order with home delivery or collection at the pharmacy. I enclose articles that may be helpful: https://www.gdziepolek.pl/artykuly/fakty-i-mity-o-tradziku-mlodzienczym https://www.gdziepolek.pl/kategorie/dermokosmetyki-do-skory-tradzikowej