Yes, ibuprofen (Advil) is considered a blood thinner. It doesn't actually thin your blood, but slows down your blood clotting time. For example, if you cut yourself or have an injury where you bleed, it may take longer for you to form a blood clot. Helpful, trusted answers from doctors: Dr. Wright on broken blood vessels on back: The prominence of veins through the skin is affected by many factors including levels of hydration and dehydration, body temperature as well as outside temperature, medications and even levels of stress. Fair skinned people tend to have more easily visible veins. Hello Latricia1, I have been on Coumadin for 8+ years and will be on it for life. I have been told by a Hematologist (blood specialist) that once in a great while that can be expected, unfortunately there is no specific tests that have been run for that to verify it. Anticoagulant medications are commonly called blood thinners. These medications do not actually cause the blood to be thin, according to the National Institutes of Health (NIH), but instead prevent the blood from forming clots too quickly or easily. Warfarin Warfarin is part of a group of medicines called anticoagulants. ANTI means against and COAGULANT refers to the clotting of blood. This medicine helps to prevent new harmful blood Warfarin (Coumadin) interacts with LICORICE. Warfarin (Coumadin) is used to slow blood clotting. The body breaks down warfarin (Coumadin) to get rid of it. The higher the INR number, the thinner your blood. The lower the number the thicker your blood. 1 is normal blood without blood thinners. And although we say thinner generally what that means is that it takes longer to clot. Both the answers you got are good ones. I only want to add that sometimes what appears to be blood in your urine, is blood that has actually seeped out of your intestines and mixed with your urine. Helpful, trusted answers from doctors: Dr. Patrick on how to heal blood vessel in eye fast: 99+% of the time this just happens spontaneously and we never know why. High blood pressure can be a cause, though. Get your blood pressure checked. If this happens repeatedly you should see your doc. Lip GY et al. Comparative validation of a novel risk score for predicting bleeding risk in anticoagulated patients with atrial fibrillation: the HAS-BLED (Hypertension, Abnormal Renal/Liver Function, Stroke, Bleeding History or Predisposition, Labile INR, Elderly, Drugs/Alcohol Concomitantly) score.