Does drinking alcohol thin the blood?

No! Alcohol is a vasodilator. It causes the blood vessels to expand. This is particularly true for the tiny capillaries located just below the skin's surface. The normal thermostatic control of the body is altered by alcohol ingestion. The blood vessel dilation allows a greater amount of blood volume to be brought to the skin's surface. This facilitates heat loss and also explains why your face looks flushed when you have been drinking. But alcohol does not thin blood.

However, Ibuprofin (aka ADVIL) which tons of people take before tattoos DOES thin your blood.