Propylene glycol has the following effects on the skin:

1. Propylene glycol can enhance the water absorption and moisture retention of the skin. Propylene glycol absorbs water molecules, and when applied, it increases the skin's ability to absorb water, leaving the skin feeling fresh without any slimy effects.

In addition, propylene glycol also helps water molecules dissolve facial dirt, enhancing the skin's ability to retain moisture and preventing rapid skin dryness during makeup removal.

2. Propylene glycol can promote the absorption of active ingredients in the skin. Adding propylene glycol to a cream can help some of the active ingredients in cosmetics penetrate into the skin and help the skin absorb the active ingredients.

Although propylene glycol has a great effect on the skin, it also has certain side effects. If patients use propylene glycol in a large dose, it will irritate the skin, which may cause skin inflammation and lesions, causing skin symptoms such as erythema and itching. So patients should use propylene glycol in moderation. If the skin becomes inflammatory, stop using propylene glycol immediately and apply erythromycin ointment or mupiroxacin ointment for anti-inflammatory treatment.