A lot of small particles on a child’s face may be related to prickly heat, peri-corneal keratosis, contact dermatitis and other causes. 1. Prickly heat: When the weather is hot, sweat cannot be discharged in time and accumulates in the human skin, which can cause inflammation and the phenomenon of children’s faces with a lot of small particles. 2. Perifollicular keratosis: related to genetic factors, manifested as a hair follicle as a unit of skin-colored corn-like papules, the center of the hair penetration, extrusion of white granular discharge, the top of the formation of crusts. 3. Contact dermatitis: If a child’s face is exposed to allergenic substances, it can cause the body to have an abnormal immune response, resulting in a lot of small particles on the face. A lot of small particles on the face of the child suggests that parents take the child to the hospital in a timely manner to clarify the cause of the disease, under the guidance of the doctor for standardized treatment.