Small red dots on the palms of the hands may be caused by allergic dermatitis, eczema, sweating herpes and other diseases. 1. Allergic dermatitis: mostly caused by contact with allergens, such as consumption of seafood, dairy, eggs, contact with pollen, dust mites, formaldehyde and other substances, can lead to small red dots on the palms of the hands, accompanied by itchy skin rash, erythema and other symptoms. 2. Eczema: a variety of internal and external factors caused by the inflammatory reaction of the skin, can cause small red spots on the palms of the hands, itching, skin erythema, pimples, blisters, accompanied by oozing, redness and swelling in severe cases. 3. Sweat herpes: eczema-like hypersensitivity reaction occurs in the skin, mostly in spring, summer and fall, can also cause small red spots on the palms of the child, can be accompanied by a certain degree of itching. Causes of small red spots on the palms of more causes, it is recommended to timely visit the hospital dermatology, follow the doctor’s instructions standardized treatment.