### What is Erythema Ab Igne? Erythema ab igne, also known as toasted skin syndrome, is a rare skin rash caused by long-term exposure to low heat from sources like heating pads, laptops, and stoves. The name comes from Latin, meaning 'redness from fire.' ### Causes This condition occurs when the skin is exposed to heat that isn't hot enough to burn immediately but causes damage over time. The heat exposure can come from various sources such as heating pads, laptops, heated car seats, and space heaters. Historically, it was more common among people who worked near stoves or fires, like bakers and metalworkers. ### Symptoms Initially, the rash appears as blotchy and pink. Over time, it develops into a brownish fishnet pattern. The affected skin may become thinner or thicker and could develop blisters. The rash can be itchy, burning, or painful, although it is usually not bothersome. ### Who is at Risk? Erythema ab igne is more likely to affect people who regularly use heating pads for chronic pain or work near heat sources. Women and people assigned female at birth are also more likely to get it, especially on the front of their legs. The average age for developing this condition is around 28 years old. ### Diagnosis A dermatologist can diagnose erythema ab igne by examining the rash and asking about your exposure to heat sources. In some cases, a skin biopsy may be needed to rule out other conditions, including skin cancer. ### Treatment The most important step in treating erythema ab igne is to avoid the heat source causing the rash. This might mean placing your laptop on a desk instead of your legs or not using seat warmers in your car. For chronic pain, alternative treatments like medication or acupuncture can be considered. ### Prevention To prevent erythema ab igne, limit your exposure to heat sources. If your job involves working near heat, talk to your employer about protective measures. Using protective gear or working farther from the heat source can help. ### Potential Complications While the rash usually goes away on its own within a few months, it can sometimes take years. In rare cases, it may cause scarring or lead to skin cancers like squamous cell carcinoma or Merkel cell carcinoma. Regular check-ups with a dermatologist are essential to monitor the rash and ensure it doesn't develop into something more serious. ### Conclusion Erythema ab igne is a rare but usually harmless skin condition caused by long-term exposure to low heat. Avoiding the heat source is the primary treatment, and the rash typically resolves on its own. However, it's important to consult a dermatologist to rule out other conditions and monitor for potential complications.