DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Spontaneous bruising in a 70-year-old male taking aspirin and clopidogrel. Bruising is caused by the rupturing of small blood vessels (capillaries) beneath the skin. Both aspirin and clopidogrel are blood-thinners that stop platelets from clumping together and forming blood clots. Therefore, patients taking medicines such as these are at a higher risk of bruising than normal.
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