Is it vitamin b deficiency is a matter of concern? what should i have in my diet to overcome this deficiency?

Possibly: B-vitamins are absorbed in the small intestine. People who suffer from intestinal inflammation from either crohn's disease or irritable bowel syndrome often have absorption issues. Speak with your general practitioner and see a gastroenterologist if needed. High potency b-complex vitamins taken 1 - 2 times a day are often prescribed.

Vitamin B: What vitamin b are you referring to? There are different ones -b1, 2, 6, 12, etc. Some can be replenished by certain diet, whereas others (such as b12) needs to be take as medication to replenish.