Is ndication to use aspirin in venous thrombosis?

anticoagulation: Anticoagulants, like warfarin, heparin, and many newer ones, are the drugs of choice vs antiplatelet agents, such as aspirin, in spite of all being blood thinners.

Maybe. : If you have a superficial thrombosis, some physicians treat this with aspirin. I would be more aggressive, especially since you have sickle cell, and suggest you consider warfarin or xarelto for real anti coagulation.

No: Usually Heparin and warfarin for new proven dvt. Later Aspirin may be used if no contraindication, and no indication for long term warfarin- like a clotting disorder.