浙江小伙双腿长出“蟒蛇纹”！近期很多人这么做，尤其是睡觉……

Core Viewpoint - The article highlights the increasing incidence of a skin condition known as "fire-induced dermatitis" or "fire-induced erythema" during winter, attributed to prolonged exposure to heating devices such as electric blankets and heaters [1][3]. Group 1: Condition Overview - Fire-induced erythema is characterized by persistent red spots and capillary expansion due to prolonged exposure to external heat sources, commonly seen in areas frequently in contact with these heat sources [1][3]. - Patients like Xiao Lin have reported symptoms including localized skin dryness, itching, and pain, with the condition being diagnosed by dermatologists [1][2]. Group 2: Medical Insights - Dr. Xu Gejiao explains that skin is highly sensitive to temperature, and exposure to heat sources at 45-50°C can lead to capillary expansion and subsequent pigment deposition in the skin, resulting in discoloration [3][4]. - The discoloration often appears as net-like or patchy brownish-purple spots, typically in areas that frequently contact heat sources, and may initially present with mild redness and capillary expansion [2][3]. Group 3: Recommendations - It is advised to maintain a safe distance from heating devices and to avoid direct skin contact, using towels or heat-resistant pads as barriers [4]. - Continuous use of heating devices should not exceed 30 minutes, and individuals experiencing unexplained skin discoloration related to heating device use should seek medical attention promptly [4].