Small red dots on the back of the hand may be caused by eczema, may be caused by contact dermatitis, and may be caused by vascular nevus, the causes are different, the treatment is different. 1. Eczema: Eczema is an inflammatory disease of the superficial dermis and epidermis caused by a variety of reasons, patients with this disease can appear on the back of the hand with small red dots on the symptoms, the treatment should be to reduce the external stimulus, can be used to dexamethasone cream applied to the affected area for treatment. 2. contact dermatitis: contact dermatitis is a kind of skin contact with exogenous substances after the emergence of the disease, the contact site can appear erythema or pimples, the patients of the disease can appear on the back of the hand with small red spots on the symptom, the treatment should be to avoid contact with exogenous substances that can lead to allergies, the treatment can be used in the boric acid solution cold wet compresses, but also the use of benzydamine, glycerine lotion, and other drugs for treatment. 3. Vascular nevus: Vascular nevus is a disease caused by the expansion of blood vessels, the disease can lead to the appearance of light red or dark red spots on the skin, patients with this disease can appear on the back of the hand with small red dots of the symptoms, treatment, for asymptomatic patients only need to follow up, for the lesions have increased patients, you can consider the laser and other physical therapy to eliminate. In addition to the above diseases, other diseases can also lead to the symptoms of small red spots on the back of the hands, and should be consulted as soon as possible, so that the doctor can identify the cause and dispose of it.