If you don’t follow the instructions, your epidermis may absorb too much salicylic acid solution and lead to poisoning. This medicine should not get in contact with your eyes and mucous membranes such as the mouth, within the nose, and genitals. If you apply the medicine in such places by mistake, flush the area quickly with water for 15 minutes. If you want to know more about salicylic acid cleanser, please go here: http://www.amazon.com/Salicylic-Professional-Chemical-Hamamelis-Virginiana/dp/B00GEG0FRM