Chest pain at the touch may be caused by trauma, acute mastitis, costochondritis, herpes zoster and so on. 1. Trauma: This symptom occurs when the chest is violently hit, squeezed, bruised, punctured and other traumatic injuries leading to local skin, subcutaneous tissue and even rib injuries. 2. Acute mastitis: mostly seen in breastfeeding women, due to excessive milk secretion leading to the blockage of mammary gland ducts, followed by bacterial infection leading to acute inflammatory lesions in the mammary gland, so this symptom occurs. 3. costochondritis: the costochondral bone at the junction of the sternum and the ribs is inflamed due to trauma, infection and other factors, localized swelling and pain, so this symptom occurs. 4. Herpes zoster: Herpes zoster virus infection leads to blister-like changes in the skin of the chest wall widely distributed in bands, so this symptom occurs. Chest pain at the touch may be related to a variety of factors, it is recommended to consult a doctor to clarify the diagnosis.