I am 22 years old. My breast cup size is 36b but my under bust size is 34. Should I get a reduction or is 36b OK for me?

Thank you for your query. Based on your description, you do not appear to be a candidate for breast reduction. You may want some reshaping of the breasts,if you wish, but reduction of a B cup breast is not to be recommended. Please find an experienced Board certified Plastic surgeon who can examine you and help you with all your concerns. All the best !

At size 36 B, it is
very unusual to undergo a breast reduction. 
It is possible you will benefit from a breast lift instead and I
recommend The Bellesoma Method.  This
technique will reshape your breast tissue creating upper pole fullness without
implants, elevate them higher on the chest wall and more medial to increase
your cleavage.  Vertical scars are
avoided, nipple sensation and the ability to breast feed are maintained.  The weight of the breast is transferred to
the underlying pectoralis major muscle resulting in pain relief and long term
stability.  Best Wishes,Gary Horndeski, M.D.

Hi! I would not consider a breast reduction based on your bra size. Things to consider for a breast reduction are: Back pain, grooving, rashes under the breast etc...I would suggest setting up a consult with a board certified plastic surgeon.