“Toasted skin” syndrome (erythema ab igne) is characterized by skin discoloration, itching, and a burning sensation after prolonged exposure to a consistent heat source.

Exposure to low-level heat (43 to 47 degrees C), not hot enough to cause burns, can still result in a circular, reddened area at the point of contact. The exact cause of this discoloration remains unclear, but researchers believe prolonged heat exposure alters the elastic fibers within the skin and affects the small blood vessels on its surface. Children are more susceptible to toasted skin syndrome due to their sensitive skin.

Toasted skin syndrome can be caused by various objects. Initially recognized in individuals using wood-burning stoves and hot coals, it commonly affected coal miners and chefs who experienced prolonged exposure to these heat sources, resulting in toasted skin on their faces.

Other causes include:

: Resting a laptop on one's lap for extended periods, often affecting the left thigh due to the placement of most laptop batteries and vents.

: Using heated car seats continuously for several hours.

: Using heating pads or hot water bottles to soothe abdominal pain, which has been linked to toasted skin syndrome after extended use.

: Indoor space heaters.

Placing a laptop on your lap for extended periods can cause "toasted skin" syndrome. Illustration generated by AI.

There is no specific treatment for toasted skin syndrome, but several methods can alleviate symptoms. Removing the heat source is the best way to prevent further skin irritation, allowing the discoloration to gradually fade. If laptops are the cause, consider using a laptop sleeve or adjusting your workspace.

Topical medications like retinoids can also help reduce symptoms. In some cases, toasted skin syndrome can lead to more serious skin cell changes, potentially developing into other conditions, including skin cancer. Associated cancers include squamous cell carcinoma, Merkel cell carcinoma, and cutaneous lymphoma. While cancer is not a common complication, consult a doctor if you notice any unusual skin changes.

Anh Ngoc (According to Healthline)