“What causes leg tingling?”

There are many causes of "neuropathy" which is a sensation of pins and needles, tingling, or numbness that you might feel. Neuropathy is common in the legs. There are many causes. Some common causes include diabetes (high blood sugar), problems with your thyroid gland, a low level of vitamin B12 (particularly if you are vegan), and pressure on nerves that is occurring somewhere in the body. Of course there are many other causes, however, these are some of the more common causes. It is important to get checked, and get some blood tests done.
Best of luck!

Neuropathy