How do subcutaneous mites manifest? - briefly
Subcutaneous mites generate painful, erythematous nodules or papules under the skin, frequently accompanied by pruritus or a sensation of movement. Diagnosis is confirmed by dermoscopic inspection or biopsy that shows mite tunnels and larvae.
How do subcutaneous mites manifest? - in detail
Subcutaneous mites produce a range of cutaneous signs that reflect their intrusion into the dermal layers. The most common presentations include:
- Intense pruritus, often worsening at night;
- Erythematous papules or nodules localized to areas of mite activity;
- Vesicles or pustules that may rupture, leaving ulcerated scars;
- Linear or serpiginous tracks corresponding to mite migration paths;
- Hyperpigmented macules that persist after inflammation subsides.
The lesions typically appear on the hands, wrists, elbows, and lower abdomen, but can involve any skin region where mites penetrate. In some cases, secondary bacterial infection develops, evident by purulent discharge and increased pain.
Histopathological examination reveals mites within the epidermis or superficial dermis, surrounded by eosinophilic infiltrates and edema. Microscopic analysis of skin scrapings shows characteristic oval or elongated bodies with distinct leg segments, confirming infestation.
Differential diagnosis must exclude allergic dermatitis, fungal infections, and other arthropod bites. Laboratory confirmation through dermoscopy or skin biopsy distinguishes subcutaneous mite involvement from these conditions.
Management requires topical acaricides applied directly to affected sites, supplemented by systemic agents for extensive disease. Post‑treatment follow‑up includes monitoring for residual lesions and preventing reinfestation through environmental control.