Pimples and red spots on the face and chest are usually due to acne caused by excess oil, sweat, or hormonal changes. Wash the area twice daily with a gentle acne face wash containing salicylic acid, avoid squeezing pimples, and use a light, non-oily moisturiser. Applying a topical gel with benzoyl peroxide or adapalene at night can help reduce inflammation and new breakouts. Wear loose cotton clothes and keep the chest area clean and dry. If acne is severe, painful, or leaving marks, consult a dermatologist for stronger prescription treatment.