The causes of red blood spots on hands may be lupus erythematosus, contact dermatitis, hand-foot-mouth disease, and allergic purpura.
1. Lupus erythematosus:The cause of lupus erythematosus is unknown at present, which can be caused by genetic factors, sex hormones, environmental factors and other factors. It is characterized by bright red spots on the skin, mung bean to soybean in size, with adherent scales on the surface. Early active treatment can improve the prognosis.
2. Contact dermatitis: contact dermatitis is due to skin contact with exogenous pathogenic substances, such as detergents, soaps, bleach, etc., stimulating the skin or triggering an allergic reaction. Manifested as erythema, pimples or papules on the skin, itching, burning pain and other symptoms. After regular treatment, the symptoms can be relieved.
3. Hand, foot and mouth disease: Hand, foot and mouth disease is most common in preschool children, mainly caused by enterovirus infection. It is characterized by red macules and herpes on the skin, and the rash is not painful, itchy, crusty or scarred. After active treatment, the prognosis is good.
4. Anaphylactic purpura: The cause of this disease is currently unknown, and may be related to infection, allergy, drugs, genetics and other factors. It manifests itself as a purplish-red rash on the skin, pressure that does not fade, red bleeding spots, hematoma and other symptoms. Most patients have a good prognosis. Some patients can recur, or affect the kidneys, digestive tract, joints.
It is recommended that patients go to the dermatology department of regular hospitals, make a clear diagnosis under the guidance of doctors, and timely treatment to avoid delay.