Why does a doctor say no NSAIDs for 7 days before upper eyelid surgery?

Nonsteroidal anti-inflammatory drugs affect the blood system by creating more potential for bleeding. Bleeding in the upper eyelid around the eye can be devastating. This is why it's critically important for you to stop your nonsteroidal anti-inflammatory's at least 7 to 10 days prior to your surgery.

Most surgeons want patients to not use NSIADs for a week preop for about the same reason to not use aspirin. It can lead to more bleeding during the case and worse swelling and bruising after the case. Aspirin is worse but best to avoid both. Discuss with your surgeon what to substitute. Tylenol is usually okay to use.

NSAIDS (non-steroidal anti-inflammatory drugs) decrease platelet function.  Platelets are essential to proper blood clotting.  If you take an NSAID prior to surgery you are more likely to experience an increase in bleeding during and after the procedure.  This can be quite significant and require treatment in the hospital.  If you are taking NSAIDS on the advice of a doctor, you should discuss this with your surgeon during your consultation.  NSAIDS are available over the counter (like aspirin, ibuprofen and naproxen just to name a few) as well.  It is CRUCIAL to follow your surgeon's pre-operative instructions to the letter.  ALWAYS be honest with your medical team about your medications and medical problems.  It is better to delay or reschedule surgery than to experience a preventable complication!