Only the upper body has red bumps and itching

The phenomenon of red bumps and itching only on the upper body is most likely caused by skin allergies. Allergies can occur in any part of the body. However, after all, the clothes we wear on the lower body can usually cover the lower body tightly, so the chance of allergies is much lower than that of the exposed upper body. We also need to learn more about the phenomenon of skin allergies to compare with the red bumps on the body.

The causes of skin allergies include internal factors and external factors. External factors include diet, inhalants, climate, contact with allergens, etc. Among them, seafood, protein, spicy food, alcohol, inhalation of pollen, dust mites, cold weather, contact with chemicals, soaps, detergents, etc. are the most common causes of skin allergies. Internal causes: Allergic substances combine with the bronchial mucosa, nasal mucosa, and skin blood vessels, causing allergic rhinitis with sneezing and runny nose, allergic asthma with constant wheezing, and allergic dermatitis with itchy skin. In the process of allergic reaction, allergic mediators play a direct role. Allergens are the external causes of allergic symptoms, while low immune capacity of the body and oxidative damage to mast cells and alkali phagocytes by a large number of free radicals are the internal causes of allergies. In addition, according to traditional Chinese medicine theory and the latest research results, allergies are mainly caused by wind, dampness and heat in the blood and skin, or by blood heat and external wind. That is, it is closely related to the fact that there are certain toxins in the human blood.

Disease characteristics Skin allergies mainly have the following characteristics: Skin allergies are characterized by: 1. The skin epidermis is thin, delicate and fair, with less sebum secretion, relatively dry, obvious capillaries, and skin showing signs of dryness and hypofunction. The ability of the stratum corneum to retain moisture is reduced, and the sebum film on the skin surface is not fully formed. 2. Contact with cosmetics or seasonal allergies can easily cause skin allergies, resulting in redness, swelling and itching. The skin lacks luster and the cheeks are prone to redness and swelling. 3. Due to seasonal changes, the skin tends to be in an unstable state. The main symptoms are itching, burning, stinging, itchy skin and small rashes.