Yes.  Malnutrition has been shown to cause peripheral neuropathy and has been associated with alcoholism, gastric bypass surgery, intestinal disease, improper diet and will often present with a painful neuropathy.  Symptoms will present as "burning feet" and is often very painful.  In the case of Gastric Bypass Surgery, it is a problem of poor absorption of nutrients necessary for normal nerve function including B vitamins (specially thiamin, B12, folic acid and B6), copper and other important nutrients.   Since gastric bypass surgery is also associated with decreased caloric intake, it increases the probability of malnutrition.

If you will be undergoing (or have undergone) gastric bypass surgery, discuss this possibility with your surgeon.  There may be supplements you can add to your daily intake to decrease the chances of peripheral neuropathy.

Brandt R Gibson, DPM
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Podiatrist, Neuropathy Doctor, Father of 11 and Founder of Mountain West Foot & Ankle Institute