If someone has problems with the following, be careful with sauna recommendations

- acute illnesses such as flu or a cold

- vein diseases, such as varicose veins or vein inflammation (beware pregnat women or those with hormonal disbalances!)

- diseases of the liver and kidneys

- epilepsy

- after a stroke, heart attack

Generally older and young people like male and female (hormones!) work differently - often quite the opposite.