There are few. Sometimes localized redness that disappears after a few hours. Sometimes some local pain that rarely exceeds 2 to 3 hours. There may also be some itching without consequences and often due to the reactions of certain cosmetic products used by clients. Hence there is interest in asking clients to not use anything before coming to do the treatment because some products can crystallize to the cold and cause discomfort.
Are there any risks?
The risks concern only people with contraindications mentioned and remain minor and temporary.