There are many reasons why stomach skin hurts when it touches clothes, such as bacterial infection, viral infection, allergic factors and so on. 1. Bacterial infection: the stomach skin itself has a bacterial infection, and the clothes will cause friction when touching the skin, so it will lead to the appearance of pain. 2. Viral infections: Herpes simplex, herpes zoster and other diseases on the stomach will lead to localized skin blisters with pain, blisters can cause friction when they come into contact with the clothes, and the phenomenon of pain when the stomach skin touches the clothes. 3. Allergic factors: clothing material is not good, contains allergic substances, resulting in allergic dermatitis, can lead to the phenomenon of pain when the stomach skin touches the clothes, at the same time, the skin may also appear itching, erythema and other phenomena. There are many reasons why the stomach skin hurts when touching clothes, if the symptoms can not be relieved for a long time, it is recommended to go to the hospital in a timely manner to improve the examination, under the guidance of the doctor to take standardized treatment, and not to private treatment, so as not to lead to adverse consequences.