I'm 17 wear 36D bra i want to do breast reduction would it affect me in the future?

If you are 17 and have very large breasts, breast reduction,may
be an appropriate procedure. It's important to be sure expectations are
realistic and you have an understanding of the commitment needed for the
healing process. Make sure that you understand the nature of your surgery, the
recovery process, and that you feel comfortable and emotionally ready to make
these changes to your body.

I'm sorry to hear about the physical and psychosocial problems your disproportionately large breasts are causing you.It is probable that you are dealing with juvenile breast hypertrophy along with the physical and psychosocial consequences of this diagnosis. In other words, the breasts are too large for your frame causing both physical and psychological distress.Unsatisfactory scarring is one of the potential complications. Make sure you also understands that further surgery may be necessary in the future (for example if the breasts were to grow in size again).On the other hand, breast reduction surgery is one of the most patient pleasing operations we perform and I think that for the right teenager (enough symptoms) it may be an excellent option (regardless of the age).Sometimes breast reduction surgery is covered through health insurance. The best way to obtain insurance coverage for breast reduction surgery involves some “hoops” to jump through. The more documentation you have (for example, from your primary care doctor, physical therapist, chiropractor etc.) the better when it comes to obtaining insurance “authorization” for the procedure.This documentation and letter/pictures from your plastic surgeon will help you obtain authorization. When the time is right, seek consultation with well-trained/experienced board-certified plastic surgeons.
I hope this, and the attached link, helps.

Depending on you height and weight most patients with a D cup will go to a small C cup after a reduction mammoplasty. 90% of breast reductions are done without the need for a total removal and replacement of the nipple, thereby allowing for a return of near normal sensation to the nipple and the ability to breast feed. Since the breast is altered significantly after breast reduction, we recommend that a base line mammogram be done approximately 1 year after the procedure. The benefits of Reduction Mammoplasty are:
reduction in chest wall heaviness with an avoidance of future back issues better ability to be involved in a more active life style