This seems to be varicose veins,nothing to worry,just start wearing compression stockings if that's not available elevation is recommended for your condition.theres something called as buergers and Allen exercises that will help.. trying to send some pointers to do the exercises-
Buerger-Allen exercises.
1.Elevate feet on padded chair or board for 30seconds to 3 minutes.
2.Sit in relaxed position while each foot is flexed and extended ( dorsi and plantarflexion )then pronated and supinated for 3 minutes.The feet should become entirely pink. If the feet are blue or painful, elevate them and relax as necessary.
These are just exercises which are suggested at home
Next Steps
For better opinion and Treatment kindly consult a Vascular Surgeon and a Physiotherapist in person.
Health Tips
Avoid long standing positions