blood and sand and dual strike

does Blood and Sand work with Dual Strike?

cause it doesnt show on the tool tip when i switch stances

Dual Strike has no inbuilt blood/sand mechanic and does not have the area tag. By itself, there is no interaction. Note that the change to single target melee attacks, now tagged "strike", to hit multiple enemies close together does not count as area nor splash.

It should however work, if you put a Melee Splash gem into it, as it turns Dual Strike into an area attack.