Why is it important to stop drinking teas 30 days before BBL surgery? Can you still rink detox teas ?

The reason the teas are not good leading up to surgery are for a couple reasons. 
First of all, they really are not going to do you any good or benefit leading up to surgery. You would be better off taking a multi-vitamin for a month before. 
Second, tea companies are not regulated and we do not know anything of what they are putting in there and you don't want to mess with your body when you are leading up to surgery. 
Third, there are a lot of herbal things that are ok for life in general (vitamin E oils, ginseng, echinacea, etc...) but these have all been shown to mess with the clotting cascade and cause you to bleed and ooze more during surgery (we don't want more bleeding!)
Fourth, if you are drinking them to "detox" or lose weight leading up to surgery, there is much more chance that you will be more dehydrated leading into surgery than you will have actually lost a few pounds. If you are more dehydrated, it is going to mess with your blood pressure, heart rate, and make you overall feel more crummy after surgery. It makes recovery tougher.
So in short, it isn't going to do you much good, but it can make things worse in a lot of ways. 
Ramsen Azizi M.D.
Double Board Certified Plastic Surgeon
R.A.M. Plastic Surgery - Chicago

Thank you for your question. What I recommend you is follow all your plastic surgeon advice to have the best results of your desire and a good experience in this journey. Respectfully,Dr. Emmanuel Mallol Cotes.-

You should follow you plastic surgeon's advice.  I advise my patients to STOP ALL sources of Vitamin E, e.g., Vitamin E pills, multivitamins, Slim Fast Ensure Plus, ALL HERBS, e.g. Ginko, Garlic, Ginseng, natural or health preparations e.g. bee’s pollen, protein powders, etc. 1 week before surgery. Removing teas from your diet prior to surgery can reduce such side effects as accelerate heart rate or BP elevation.  Shown to reduce blood clotting, green tea can lead to postoperative complications and lengthen your healing time.