Can blood thinners cause nosebleeds?

Nosebleeds are very common and occur when the fragile blood vessels in the nose are irritated. Blood thinners can cause or worsen nosebleeds. The blood thinners make clotting more difficult; therefore, it may take longer to stop nosebleeds when someone is on blood thinners.

Yes, blood thinners cause just that, a thinning of the blood. Once bleeding starts it can make bleeding harder to stop. And areas of the body where small vessels are closer to the skin, such as in your nose, are more predisposed to opening up to the environment and bleeding.