Large red pimples on the chest may be caused by folliculitis, acne, eczema and other diseases. It is recommended to pay attention to the care of the affected area, external and internal anti-infective, antihistamine, glucocorticoid drugs, can help improve. 1. Folliculitis: Hair follicles are infected, resulting in localized red pimples, usually accompanied by abnormal itching and pain. If the symptoms are mild, most of them will improve on their own. If the symptoms are obvious, ichthyol ointment, fusidic acid ointment, oral doxycycline, cefuroxime and other drugs can be given. 2. Acne: Large red pimples on the chest are often seen as papular nodular acne. It is recommended to pay attention to the care of the affected area, do not squeeze and scratch, induced infection. Local topical erythromycin ointment, mupirocin ointment, fusidic acid ointment, oral doxycycline, minocycline, if necessary, can promote the absorption of inflammation. 3. Eczema: The cause of eczema is complicated, which may lead to localized red and swollen pimples and papules. Topical halometasone, mometasone furoate, hydrocortisone cream can be used, and oral methylprednisolone tablets can help relieve symptoms if necessary. The causes of red pimples on the chest are more varied, and patients may be accompanied by different symptoms. It is recommended not to scratch the stimulus to induce infection, you can go to the hospital dermatology department, under the guidance of the doctor standardized treatment. The medication should be used in accordance with the doctor’s instructions, do not self-medicate.