No, chocolate doesn't cause acne or make acne worse. Hormones and hygiene, rather than a chocolate allergy, are more likely the culprits. A true food allergy to chocolate is rare. Instead, a reaction to a chocolate bar may come from other ingredients mixed in, such as nuts or milk. The best approach to healthy skin is to eat an overall varied and balanced diet, keep skin clean, get enough rest and wait. After the body matures, most acne clears up. If problems are severe or persist, talk to a dermatologist. Sometimes a skin application that contains a derivative of vitamin A is prescribed, but simply taking a vitamin A tablet won't clear up the skin.