Small red spots on the hands are generally considered to be caused by contact dermatitis, hand eczema and fungal infections and other diseases, as follows: 1. Contact dermatitis: skin contact with external stimuli caused by skin allergic reaction. Generally, the skin manifests itself as red spots, erythema or edema and other symptoms; 2. Hand eczema: skin contact with exogenous allergens, stimulated by the inflammatory lesions. Generally the skin shows symptoms such as red spots, papules and blisters; 3. Fungal infection: most of the fungal infections are secondary infections, generally a variety of triggers (late night, tired, etc.) leading to a decline in the body’s immune system, the fungus (Candida albicans, red trichinella, etc.) take advantage of this easy to invade the skin, resulting in the skin being infected, generally manifested as red spots, erythema, pimples, blisters and other symptoms. It should be noted that the cause of small red dots on the hands is more complex, it is recommended to go to the hospital in time for examination, clear cause to give standardized treatment.