HEALTH REQUIREMENTS FOR ICE BATHING
Ice bathing can be practiced by any healthy person.
If you have a serious medical condition, consult a physician before taking an ice bath.
Avoid ice baths in case of hypertension (of 160/100 mm Hg or higher), cardiac or vascular problems (cardiac arrhythmias, arteriosclerosis, angioneuropathies, Raynaud's syndrome type 2), cold urticaria and acute infections.
If you suffer from migraine, I advise to be careful with ice baths and to start with cold showers.