How to regaining feeling in nipple after breast augmentation?

With Breast Augmentation Surgery, while one operation is performed, the Surgery itself is actually two distinct operations. There is a right-sided Breast Augmentation and a left-sided Breast Augmentation. The results and outcomes/side effects between the two sides can vary as dramatically as they do between two individual patients. It is excellent that you have regained nipple sensation on the right side. For the left side, because it has been over a year, the situation is less likely to change/improve. However, I do recommend desensitization techniques where you would continue to pinch the left nipple gently and over time this will become desensitized and less painful as your body gets used to the new sensory input.

Since it has been a year since surgery, your probably going to keep what sensation you have now. You have reached your complete healing time. Acupuncture might be helpful.

Hi and welcome to our forum!
During the procedure of breast augmentation, incision and dissection may divide small, even microscopic nerves which supply the nipple with sensation. There is no way to preserve them. This may result in numbness (hypostheia). This at least may partially resolve over 1-2 years. Pain to the touch (hyperesthesia) may indicate a nerve or unsatisfied nerve ending trapped in scar tissue.
Non-surgical modalities include scar desensitization, where a therapist utilizes radiofrequency or ultrasonic energy to lyse adhesions and release trapped nerves. If the pain is severe and persistent, surgical exploration of the scar may be required.
A degree of nipple numbness may be permanent and is not unusual following breast augmentation. .
Visit a board certified plastic surgeon for evaluation and discussion.
Best wishes...