Itchy small red dots on arms and neck may be caused by solar dermatitis, insect bite dermatitis, allergic dermatosis, psoriasis and other diseases.
1. Solar dermatitis: hot weather in summer, often under ultraviolet rays, can cause solar dermatitis, resulting in small red dots on the arms and neck, itching.
2. Insect bite dermatitis: not pay attention to skin care, mosquito bites, can cause insect bite dermatitis, can also lead to localized small red spots itchy.
3. Allergic skin disease: allergic body, if contact with allergens, can cause allergic diseases, common clinical dermatitis, eczema, urticaria, drug rash, etc., can lead to redness and itching of the skin.
4. Psoriasis: Itchy skin with small red spots can also be considered related to psoriasis. Psoriasis is a chronic, hereditary, inflammatory skin disease. It may cause red papules and red spots on the skin, which are covered with a thick layer of scales, and bleeding spots can be seen by scraping off the scales.
It is not excluded that other factors cause small red spots with itching on the skin. It is recommended to pay attention to the care of the skin, go to the dermatology department of the hospital in time for examination, to clarify the causes of small red dots on the skin and itching, and to treat the symptoms under the guidance of the doctor.