When a baby cries there are small red dots on the face, usually there are two reasons for this, if you look carefully at the characteristics of the small red dots, you can roughly identify. First, the baby may usually have eczema on the face, but the eczema is not serious and easy to be ignored. When crying or when the environmental temperature increases, the rash will show up as redness, and then it is easy to be found that there is a manifestation of small red dots. When touching with hands, the red dots are protruding from the surface of the skin, and the color of the red dots can disappear instantly after pressing. Secondly, when the skin is normally normal and small red dots appear when crying, but the red dots are flat when touched with the hand and contained under the skin, and the color of the red dots does not recede when pressed with the hand. This is considered to be related to the increase in pressure in the chest and abdominal cavity when crying, the pressure of the superior vena cava increases, resulting in the instantaneous rupture of the tiny capillaries in the face of the small bleeding spots, clinically known as symptomatic purpura, do not need special treatment. If the baby is observed and there are other obvious abnormalities, such as rashes and petechiae in other locations, it is necessary to ask the doctor for a further interview, comprehensive examination and analysis.