All cosmetics have an expiration date and, although it may be difficult to know, their useful life is much shorter than we think. An expired product is not as effective nor does it settle into the skin in the same way as a brand new one.

There is a risk of skin rashes, infections, irritations, eczema, allergies and a burning sensation when using it. To avoid cosmetic acne, it is best to shake your foundation before applying it, especially if it contains SPF and no longer provides the same effectiveness.