It is used extensively in Daoist stone medicine for clearing stagnation of the blood. There are lots of conditions that are the result of the blood stagnating in a specific area for whatever reason. So after stirring up a bunch of toxicity by clearing an old blockage or opening up a dormant energy channel often causes that debris to temporarily clog stuff and some bloodstone can help keep things moving in the healing process.
Sometimes I’ll use it as a sample and project it with a Vogal crystal to a specific area. If it’s a widespread issue just focus on the stone and circulatory system. Can also make an elixir by making “tea” with the stone but that’s mostly just for digestive tract issues.