1. Irritability: Some people will have a subjective burning sensation, tingling sensation and itching when used.
2, degreasing: propylene glycol has the characteristics of fat-soluble solvent, strong permeability, large solubility, excessive use may cause harm to the skin, long-term use of high concentrations of propylene glycol, the epidermal, sebum structure will have an impact.
3, irritating dermatitis: propylene glycol is irritating to the skin and mucous membranes, the higher the concentration, the more sealed the use, the greater the irritability, can cause skin redness, rash, peeling itching and rough skin .
4, allergic dermatitis: about 1 to 5% of people who are exposed to propylene glycol, will produce local skin allergic eczema reaction, usually the first contact type will not cause problems, but when it comes into contact again, it will produce skin Allergic reaction.
5, through the skin absorption: propylene glycol molecules are small and easy to penetrate, even for topical use, in theory there are some ingredients that will be absorbed into the body through the skin.