What causes red bumps under the armpit?
May 05, 2023
Source: Cainiu Health
Dr. Liu Wan
Introduction
If the skin in the armpit area is bitten by insects, it may trigger an allergic reaction, leading to symptoms such as edematous erythema, urticarial plaques, and itching. Patients may follow medical advice to apply topical medications like calamine lotion or zinc oxide ointment. Additionally, red bumps under the armpit could also be caused by factors such as folliculitis or eczema. It is recommended that patients seek timely medical evaluation at a hospital.
In general, red bumps under the armpit may be caused by insect bite dermatitis, folliculitis, eczema, or other factors. A detailed analysis is as follows:
1. Insect Bite Dermatitis
If the skin in the armpit area is bitten by insects, it may trigger an allergic reaction, leading to symptoms such as edematous erythema, urticarial plaques, and itching. Patients can follow medical advice to apply topical treatments such as calamine lotion or zinc oxide ointment.
2. Folliculitis
If hair follicles in the armpit become inflamed due to bacterial infection, symptoms such as red papules, small blisters, or pustular papules may appear. Patients can follow medical advice to use topical medications such as mupirocin ointment or clindamycin hydrochloride gel.
3. Eczema
Excessive sweating in the armpit area, resulting in a moist environment, may trigger eczema, causing symptoms like erythema, papules, and itching. Patients can follow medical advice to use topical treatments such as mometasone furoate cream or halometasone cream.
In addition, this symptom could also be caused by other conditions such as contact dermatitis or prickly heat (miliaria). It is recommended that patients seek timely medical evaluation at a hospital.
