DO NOT start blood thinner therapy (even aspirin
) until his doctor tells him to. There are dozens of reasons that his blood may be thick. These can range from dehydration
, to clotting disorders, to cancer. Aspirin may help, but it could hurt too. Blood tests will likely give the answer. There are lots of blood thinning medicines, but each work in a different way. The only way to know which one to choose is to have his blood tested. Please have him do this soon. Good luck.