How to increase bloodcirculation to prevent amputation?

Check pulses; vasdil: First, have your doctor check pulses in your legs;if absent, get vascular lab study to detect blocked artery in leg. If present, treat first. If no blocked artery try vasodilators.

Quit smoking: Quit smoking and don't use nicotine gum or patches. It's nicotine that narrows arteries thereby decreasing blood flow.

See vascular doc: Doctors that specialize in circulation will evaluate your circulatory status. Sometimes testing includes pressure measurements and at times angiography. Severe arterial blockage can be treated with ballon angioplasty or surgery. There are medications that can improve the circulation as well. A supervised exercise can improve arterial circulation.