Nature helps you.

As to low blood thickness and lowering thrombosis risks and veins diseases you can with herbs.
Willow bark white is a best remedy for blood diluting, as tender aspirin, without are bad affecting stomach, thus two tbl.sp. of choped bark adding in two glasses of water, boiling 20 minutes, use on two tbl.sp, dfor 4 times/day, for two weeks, add after week rest, repeat course.

Petals hibiscus, green tea, filipendula flowers are one tea.sp.mass adding in 1.5 glass of the hot water, infuse for 15 minutes,filter, use one glass for 2 times/day before meal, course are 4 weeks, as after add two weeks rest.