Medications That Can Cause Easy Bruising

Blood-thinning medicines, antiplatelet medicines, and some anti-inflammatory pain medicines can reduce the ease with which small damaged vessels seal. Medicines taken together may have a stronger effect. Bruising can also reflect fragile, sun-damaged skin, especially on the hands and forearms; see [Sun-Damaged Skin](/conditions/photoaging/) for context. The appearance of a bruise does not show which medicine is responsible, so timing, dose, other medicines, and health conditions all matter.

Make a complete list of prescriptions, non-prescription pain relievers, vitamins, and herbal products. Note when bruising began and where it occurs. Do not stop an anticoagulant or antiplatelet medicine on your own, because sudden changes can create serious health risks. Use gentle skin care, protect exposed skin from knocks, and ask a pharmacist or prescriber whether any over-the-counter product could add to bleeding tendency.

Arrange prompt medical advice for bruises that appear without a clear injury, keep enlarging, or occur with repeated nosebleeds, bleeding gums, unusually heavy periods, or blood in urine or stool. Seek urgent care for bleeding that will not stop with firm pressure, a rapidly expanding bruise, severe weakness, fainting, confusion, or a severe headache after a head injury.

Ask which medicine is most likely contributing, whether a blood test or medication review is needed, and which pain reliever is appropriate for you. Ask what warning signs require urgent help and whether every clinician involved in your care has the same medication list.