What should I do if a lump appears on the body?
Nov 28, 2025
Source: Cainiu Health
Dr. Liu Wenmin
Introduction
After exposure to allergens such as pollen, dust mites, food, or medication, the immune system releases substances like histamine, causing skin blood vessels to dilate and become more permeable, leading to hives or swelling. Avoid contact with allergens, and under a doctor's guidance, calamine lotion, paeonol ointment, or cyproheptadine hydrochloride cream may be used to relieve symptoms. It is recommended to seek timely medical treatment at a正规 hospital.
Generally, skin bumps may be caused by mosquito bites, allergic reactions, folliculitis, eczema, urticaria, and other conditions. If the symptoms persist or worsen, or are accompanied by other discomforts, it is recommended to seek timely medical evaluation and treatment at a reputable hospital. Specific causes are analyzed as follows:
1. Mosquito bites: When mosquitoes bite the skin, they inject saliva containing anticoagulants and allergens, triggering an immune response that leads to localized skin bumps. Maintain a clean living environment to reduce mosquito breeding, and use preventive measures such as bed nets and insect repellents.
2. Skin allergy: After exposure to allergens such as pollen, dust mites, certain foods, or medications, the immune system releases substances like histamine, causing blood vessel dilation and increased permeability in the skin, resulting in bumps. Avoid known allergens, and under medical guidance, use calamine lotion, paeonol ointment, or cyproheptadine hydrochloride cream to relieve symptoms.
3. Folliculitis: Inflammation occurs when hair follicles become infected with bacteria, leading to redness and swelling around the follicle and the formation of bumps, often accompanied by pain. Under medical supervision, topical antibiotics such as mupirocin ointment, fusidic acid cream, or erythromycin ointment can be used to control infection and promote resolution of inflammation.
4. Eczema: A combination of internal and external factors damages the skin barrier function, triggering inflammatory responses characterized by red patches, papules, and blisters (bumps), along with intense itching. Under medical guidance, apply hydrocortisone cream, desonide cream, or mometasone furoate cream. Avoid scratching and keep the skin moisturized.
5. Urticaria: Dilation and increased permeability of small blood vessels in the skin and mucous membranes lead to localized edematous reactions, presenting as wheals (bumps) of varying sizes. These are often accompanied by severe itching, may resolve spontaneously, but tend to recur. Under medical advice, take oral antihistamines such as levocetirizine hydrochloride tablets, loratadine tablets, or ebastine tablets, and avoid consuming foods that may trigger allergies.
In daily life, maintain skin cleanliness and use gentle skincare products; follow a regular sleep schedule and balanced diet to strengthen immunity; engage in moderate exercise to promote metabolism; and undergo regular skin check-ups for early detection and treatment.
