What does a subcutaneous mite do on the back? - briefly
A subcutaneous mite penetrates the skin on the back, creating a small tunnel that triggers intense itching and a localized rash. If left untreated, the infestation may cause secondary infection and prolonged dermatitis.
What does a subcutaneous mite do on the back? - in detail
Subcutaneous mites that inhabit the skin of the upper torso embed themselves within the epidermal layer, feeding on keratin and cellular debris. Their activity creates a localized inflammatory response, manifested as itching, redness, and small papular lesions. The mites lay eggs in shallow tunnels, which hatch in a few days; the emerging larvae continue the cycle of feeding and skin penetration. Repeated bites produce a hypersensitivity reaction that can lead to secondary bacterial infection if the skin is scratched.
Key physiological effects include:
- Mechanical disruption: Mouthparts pierce the stratum corneum, causing micro‑wounds that trigger nerve endings.
- Immune activation: Antigens released by the mites stimulate cytokine production, resulting in erythema and edema.
- Dermal remodeling: Chronic infestation prompts hyperkeratosis and thickening of the epidermis, sometimes forming crusted plaques.
Diagnosis relies on visual identification of the mites or their fecal pellets under a microscope, often after skin scraping. Effective treatment combines topical acaricides (e.g., permethrin 5 %) with oral ivermectin for severe cases, and antihistamines to alleviate pruritus. Preventive measures involve thorough washing of clothing and bedding at high temperatures and avoiding close contact with infested individuals.