Why do i have large broken blood vessels on legs with bruises for no apparent reason? could it be circulation issues and what can i do to reduce them?

Yes: It is easy to get a specific ultrasound of your legs to find out if you have venous disease, reflux. This backward flow of blood caused by heredity and prolonged sitting, standing, lifting etc- is weak vein valves that allows blood to pool in your legs and cause damage like pigmentation. Look up phlebology.Org and find a vein specialist in your area for diagnosis and treatment.

Heredity etc: Hormones heredity and pregnancy usually causes these problems ie spider veins and telangiectasias.