Small red dots from the abdomen especially itchy may be the emergence of urticaria, eczema, papular urticaria and other diseases. 1. Urticaria: mainly due to contact with allergic substances, such as pollen, mites, etc., can be manifested as reddish masses on the body, or small red dots, often accompanied by obvious itching symptoms. 2. Eczema: often due to environmental factors or genetic factors caused by chronic inflammatory changes in the skin, the early onset of small red dots, often occurring in all parts of the body, including the stomach, can be accompanied by obvious itching, with the development of the disease can be localized skin erosion, oozing. 3. Papular urticaria: Most of them are caused by mosquito bites, and a few of them are related to food allergies. The lesions are reddish papules at the beginning, followed by mung bean or peanut size slightly fusiform red doughnut-like damage, usually itching intensely. In addition, the small red dots on the abdomen is particularly itchy can also be seen in other diseases, it is recommended that patients seek timely medical treatment to avoid delay.