"Sauna use is a rare but potentially important cause of classical heat stroke," the doctors of a new case report warn.

In a rare medical case, a woman in her 70s was hospitalized with heat stroke after stretching in a sauna for 45 minutes.

A woman in her 70s experienced severe heat stroke after a 45-minute sauna session, causing her body temperature to dangerously rise to 107.6°F. She was hospitalized with multiple complications including seizures and kidney injury but eventually made a full recovery.

Basking in a sauna can be a nice way to relieve stress or relax muscles following a workout.But soaking too long can

The warning comes after medical professionals treated a woman in her early 70s who required hospital admission following an extended sauna session at her local gym. She had been performing stretching exercises in the sauna for around 45 minutes when she was found unconscious.

Sauna users have been urged to stay hydrated after a woman suffered severe heat stroke with multi-organ failure after basking for too long in the heat. Experts from Birmingham Heartlands Hospital described how a patient needed hospital care for 12 days after heat stroke led to a number of serious health problems including a heart attack.

Heat stroke is defined as a sharp increase in core body temperature above 40C that is associated with acutely impaired brain function.