Yes, every sunscreen has an expiration date, even though some products won’t have one on their label. If your sunscreen seems to work differently than before, it may already be expired.  The Food and Drug Administration (FDA) describes that sunscreens usually hold their original strengths for at least three years. Just to be safe from any unwanted irritation or problems, make sure to throw your bottle away when it’s already three years past its manufacturing date or date of purchase.