The cause of a piece of red skin on the right side of the waist may be allergic purpura, psoriasis, urticaria, dengue and so on.
1. Allergic purpura: The etiology and pathogenesis of allergic purpura are not clear, and may be related to infection, drugs and other factors. It can occur in the waist skin, manifested as purplish-red bleeding spots on the skin, ecchymosis and other symptoms, most of the patients with regular treatment, the prognosis is better, some patients can be recurrent episodes.
2. Psoriasis: The cause of psoriasis is unknown, and it is related to autoimmune and genetic factors. It is characterized by red patches on the surface of the skin, with mica-like flakes on the surface, which may fall off when scratching, exposing the red color of the exposed part, and dryness of the lesions, which may be ruptured and bleed, accompanied by itching, burning sensation and other symptoms.
3. Urticaria: the cause of urticaria is unknown, may be related to infection, ingestion or contact with allergic substances, such as animal fur, pollen, fish, shrimp and other factors. Manifestation of the skin, edema erythema, angioedema, itchy skin and other symptoms.
4. Danovirus: Danovirus is mainly caused by pathogens such as type B hemolytic streptococcus, through the skin or mucous membrane damage site invasion. Manifestation of edematous erythema, clear boundaries, the surface of the tension bright, localized pressure, rapidly expanding to the surrounding symptoms. After regular treatment, the prognosis is good, and some patients may recur or become chronic.
It is recommended that patients go to the dermatology department of the regular hospital in a timely manner, follow the doctor’s instructions to clarify the cause of the disease, treatment, to avoid delaying the condition.