Column: skin disease sharing: secondary purpura refers to ecchymosis, ecchymosis, hematoma and so on. On the skin or mucous membrane, it can be divided into two categories: thrombocytopenic purpura and non-thrombocytopenic purpura. The former is the decrease or lack of total platelets; The latter's hemogram is normal, which is caused by capillary intimal lesions. Include allergic purpura and pigmented purpura. Henoch-Schonlein purpura is more common in young people and children, but also in adults. Skin lesions are spots or ecchymosis on erythema from the tip of a needle to the size of mung beans. In severe cases, edematous erythema and wheal, occasional blisters and blood blisters may appear, and tissues and organs of various systems may also be involved. In addition to rash, it is accompanied by joint pain, swelling, fever and weakness. , also known as rheumatic purpura; If accompanied by gastrointestinal symptoms such as abdominal pain, diarrhea and vomiting, it is called abdominal purpura; Sometimes it can also involve the kidney and cause proteinuria, hematuria and other diseases, which is called renal purpura. Pigmented purpura is a kind of chronic hemorrhagic capillary inflammation, which mainly occurs in the lower limbs, especially on the extension side of the lower legs. Include progressive pigmented purpura, telangiectatic circular purpura and lichenoid dermatitis of pigmented purpura, which are mainly characterized by telangiectasia, some with pigmentation and some with bleeding spots. Allergic purpura is related to food allergy, drug allergy, upper respiratory tract infection and intestinal parasites. The etiology of pigmented purpura is unknown, which may be related to venous congestion of lower limbs. This disease belongs to the categories of necrophilia, blood syndrome and grape plague in Chinese medicine literature. The disease is caused by accumulation of heat in zang-fu organs, injury to blood collaterals, blood flowing out of the skin and infiltrating into zang-fu organs, or obstruction of muscle surface due to exogenous wind-heat pathogen, which damages blood collaterals and overflows the pulse, resulting in purpura. Traditional Chinese medicine believes that blood heat damages collaterals, leading to skin bleeding and purpura. Therefore, cold food can be used as adjuvant therapy. If you have the deficiency syndrome of purpura, you can use the food of invigorating spleen, benefiting qi and nourishing yin as an auxiliary treatment.