Red patches appear on the skin, followed by ulceration and pus formation.
Skin redness followed by ulceration and pus formation is usually caused by conditions such as folliculitis, acne, or contact dermatitis. Patients should follow medical advice and use appropriate medications for treatment. Specific analyses are as follows:
1. Folliculitis
Poor hygiene, excessive sebaceous gland secretion, or skin injuries may allow pathogenic microorganisms to invade hair follicles, triggering an inflammatory response. In severe cases, rashes and pus formation may occur. It is recommended to use topical medications such as mupirocin ointment or fusidic acid cream under a doctor's guidance.
2. Acne
Consuming spicy and greasy foods over a long period or poor hygiene can lead to infection with *Propionibacterium acnes*, resulting in red papules at the affected site. As inflammation spreads, these lesions may develop into pustules. Treatment may include oral isotretinoin soft capsules and topical tretinoin cream, used under medical supervision.
3. Contact Dermatitis
In individuals with genetic predisposition or specific body constitution, exposure to allergens such as dust, pollen, mites, or feathers can trigger allergic reactions, causing localized redness, itching, and raised papules. Secondary microbial infection may lead to abscess formation. Antihistamines such as loratadine tablets or cetirizine hydrochloride tablets may be used under a doctor’s direction.
Besides the above, skin redness progressing to ulceration and pus formation could also result from other conditions such as genital warts, acute eczema, or lower limb venous insufficiency. If any discomfort or symptoms occur, prompt medical consultation is advised.