Generalized skin congestion refers to the dilatation of capillaries throughout the body. The dilated vessels are mostly small veins or arteries, which appear as red filamentous, reticular or stellate damage on the skin. This results in congestion and redness of the skin all over the body. Intrinsic or extrinsic irritants in the body can cause reactive vasodilatation and congestion, resulting in redness of the skin all over the body. It is commonly seen in various types of rashes such as papules, macules, and urticaria. The rash is characterized by a generalized dilation of the skin capillaries, red filamentous, reticular or stellate skin lesions, redness and swelling of the skin and bright red bleeding spots. Dilated skin capillaries all over the body, red filamentous, reticular or stellate damage on the skin, redness and swelling of the skin and bright red bleeding spots. Tests such as syphilis serologic test, blood sedimentation, antinuclear antibody, allergen test, blood routine, fungal test, anti-microsomal thyroid antibody related test, serum complement test, auto-serum skin test, etc. are needed to clarify the primary cause. Avoid greasy and indigestible food; avoid fried, smoked and barbecued food; avoid high-salt and high-fat food. 1, avoid eating spicy fish and fishy hair: In the absence of possible causative factors, try to avoid fish, shrimp, crab and irritating food. Such as shrimp and crab, oysters, sea clams, snapper, scallops, eels, pork, rooster, beef and mutton, mushrooms, bamboo shoots, mushrooms, etc., because these foods are easy to produce wind and heat, which can give rise to the disease. Chili, pepper, cinnamon, onion, curry, fennel, tobacco and alcohol, etc. Because these foods can help heat and blood, inducing the occurrence of the disease; sometimes can also directly become allergens, producing allergic reactions. 2, avoid eating fried fatty food: such as a variety of fried, fried, baked, smoked and cured meat products, animal offal, cream cake, chocolate, etc., because these foods are easy to produce phlegm fire or gather moisture and heat, so that moisture and heat contained in the skin and induced the disease. It is important to note that if a particular food is identified as the cause, recurrence can be avoided by avoiding the food in the future. It is not uncommon to see allergies caused by foods and beverages that are not commonly eaten, including certain vegetables and fruits, as well as certain food condiments and preservatives, because these substances are not easily noticed.