I choose mask packs based on their ingredients.

Since face masks have a high absorption rate for active ingredients, it is important to select one with ingredients that suit your skin type. Face masks originated from the concept of "occlusive therapy," a method used in local treatments in dermatology. Occlusive therapy involves treating wounds or lesions by sealing them off with airtight dressings or ointments. This method increases the skin's temperature and humidity, thereby enhancing the absorption of ingredients and medications. Using occlusive therapy can boost the absorption of medications by 10 to 100 times. However, caution is required because irritation can be significantly more severe if the ingredients do not suit you. Before using a face mask, it is advisable to first check the full ingredient list to ensure there are no ingredients that might irritate you. Representative harmful ingredients include parabens, sulfates, triethanolamine, isopropylmethylphenol, and thymol.