The appearance of bruises and small red dots on the body may be a symptom of cherry-like hemangioma, allergic purpura or pigmented purpuric dermatosis. You need to go to the hospital in time to get a clear diagnosis. 1. Cherry angioma: it is a manifestation of skin aging, mostly seen in middle-aged and old people, and heredity, sun exposure is also related. The main manifestation is the appearance of scattered red, burgundy translucent nodules and papules around the body, and the surface of the skin lesions is smooth, without obvious discomfort. 2. Anaphylactic purpura: mostly caused by allergies, occurring in both lower limbs, manifested as scattered red and purple petechiae on both lower limbs, with varying degrees of itching or burning sensation at the rash. It is often accompanied by joint pain, abdominal pain and other symptoms. 3. Pigmented purpura dermatosis: the etiology of the disease is unknown, and immune system disorders, long-term use of anticoagulants and other factors are related to the lower extremities. Performance for both lower limbs scattered dark red petechiae, over time the color becomes darker to form brown. The color does not fade when pressed, and there is no obvious discomfort. There may be other reasons for the appearance of bruises on the body, it is recommended to go to the hospital in a timely manner, a clear diagnosis, symptomatic treatment.