Beyond drowning, hot tubs do present some other, less serious health risks. We often want to get into the hot tub after a long workout, but a hot tub can raise a woman's body temperature to dangerous levels. If a person has already been working their body, the additional stress of a hot tub may result in dehydration, lightheadedness, nausea and extreme weakness. Take a few minutes after your workout to bring your heart rate down, before jumping into the hot tub, and make sure that you always stay well hydrated. Bring a water bottle with you, this goes for steam rooms and saunas as well.
Hot tubs can indeed, as the myth goes, lead to infections.
Skin rashes, infections of the hair follicles, and ear infections are the most common. These can result from either bacteria in the water, or from the cleansing agents and corrosive agents applied to the tub. Repeated exposure to these agents can also do quite a number on your skin. If a woman has a history of bladder infections she should avoid hot tubs. Raising the temperature of the tub will not make a difference, it may only increase the risk of scalding her skin.