What causes itchy lumps on the body?

　　"Body lumps" is a colloquial term usually referring to abnormal skin elevations or bumps. The appearance of bumps on the skin accompanied by itching may be caused by factors such as sweat blockage, insect bites, eczema, urticaria, or psoriasis. If abnormalities occur, it is recommended to seek medical attention promptly. Specific analyses are as follows:

　　1. Sweat Blockage

　　In hot weather or after intense physical activity, sweat may not evaporate in time, leading to clogged pores that irritate the skin and trigger an inflammatory response, resulting in small bumps and itching. To prevent this, maintain clean and dry skin, wear breathable clothing, and avoid prolonged exposure to hot, humid environments.

　　2. Insect Bites

　　After insect bites, toxins in the insect's saliva are injected into the skin, causing an allergic reaction that leads to localized redness, swelling, and itching, forming bumps. As directed by a healthcare provider, topical applications such as antipruritic tincture, calamine lotion, or essential balm may be used to relieve itching and swelling.

　　3. Eczema

　　Eczema can be triggered by genetic and environmental factors, resulting in impaired skin barrier function, loss of moisture, and penetration of external irritants, which provoke inflammation and cause symptoms such as redness, itching, and bumps. It may also be accompanied by dryness, flaking, and oozing. It is recommended to use medications such as desonide cream, loratadine tablets, or cetirizine tablets under medical supervision. Additionally, keep the skin clean and dry and avoid contact with irritants.

　　4. Urticaria (Hives)

　　Urticaria is typically caused by allergic reactions to external triggers such as food or medication. Allergens stimulate the release of histamine and other chemicals in the skin, leading to blood vessel dilation and fluid leakage, resulting in red patches and raised bumps. Systemic allergic reactions such as fever, sore throat, or difficulty breathing may also occur. Avoid known allergens, and under medical guidance, consider using medications such as montelukast sodium tablets, compound glycyrrhizin tablets, or hydrocortisone cream to alleviate symptoms and control the condition.

　　5. Psoriasis

　　Psoriasis results from immune system dysfunction causing excessive proliferation of skin cells, leading to red patches, scaling, and bumps accompanied by itching. Patients may also experience joint pain and fatigue. Follow medical advice to use topical treatments such as calcipotriol ointment or tretinoin cream, as well as oral medications like methotrexate tablets or cyclosporine capsules to manage the disease and relieve symptoms.

　　In daily life, if an allergic reaction is suspected, immediately discontinue contact with or consumption of potentially allergenic substances. Also, maintain good skin hygiene to reduce the risk of developing skin conditions.