I have very visible green veins on my legs. Can these be treated? (photos)

Green or blue leg veins are called reticular veins and the gold standard treatment for them is sclerotherapy.  You seem to have a lot of veins in the posted picture so you should consider seeing a vein specialist and having a venous ultrasound to see if there is any underlying reflux contributing to the vein formation.

When aware of signs and symptoms of venous disease, you should seek medical advice. There are  treatment options and conservative management available for handling the condition. If you become informed, this is the ideal way to prevent any aftereffect. 
I recommend a Board Certified in Veins and expert to explain options and manage vein disease. Thanks for your question!

Hi Elizabeth. The leg veins in the photo you send can be easily treated. However, you need an ultrasound scan to the deeper veins in your legs to ensure that no veins underneath the skin need treatment