Salicylic acid is a type of beta-hydroxy acid derived from willow bark. A natural exfoliant, the acid is commonly used in topical treatments for aging, sun-damaged skin and acne-prone skin. Salicylic acid is available in a number of commercial skincare products, but you can make your own using a common ingredient from the medicine cabinet. Aspirin contains salicylic acid, and topical aspirin applications produce rejuvenating effects similar to those of its cosmetic counterparts.
Combine the baking soda with 1 cup of water in a small bowl. Mix thoroughly and set aside.
Place the uncoated aspirin in the second bowl and sprinkle it with lemon juice until the pills dissolve into a paste. Use the spoon to crush any larger pieces.
Use clean hands to spread a thin, even layer of the aspirin mixture all over your face, avoiding the eyes. Let it dry for five to 10 minutes.
Soak a cotton ball in the baking soda and water mixture, and use it to gently wipe off the aspirin peel. The baking soda acts as a neutralizer for the acid.