The body has the following considerations: 1, if the red dot with itching, commonly considered eczema, eczema belongs to the allergic skin disease, you can use glucocorticoids to anti-inflammatory treatment. 2, if the red dot is not itchy and painful to consider may be purpura dermatosis, the rupture of tiny blood vessels under the skin caused by small red dots, slightly raised on the surface of the skin, the color will not fade after pressing down with the finger. It is also not a painful and itchy feeling. It is recommended to go to the dermatology department to check the routine blood platelet situation, pay attention to whether the platelet is reduced, if the platelet is reduced, you need to go to the hematology department to consult, if the platelet is normal, you can go to the dermatology department for further treatment.