How do I know if I need to throw something away?

With correct storage and handling, cosmetic products remain in good condition for their expected life span. However, if a product has not been stored properly, for example it has been left with the lid off for long period of time the product may expire before the expiry date or the period after opening has passed. You can spot this by discoloration, a different smell, or a different look and feel of the product (lumpy rather than smooth for example). In such cases, the product should be discarded and should not be used anymore as they can cause medical issues. Please consult a medical professional before using products in this condition.