It is normal to feel discomfort the first few weeks after breast augmentation. It is doubtful that simply moving your arm the wrong way will cause significant damage. The final appearance, shape, and movement and pain/tightness resolution take time - months to see your final result. Pain to a varying degree is normal after this procedure. Recovery in my experience does not happen at the same rate for both sides but eventually even out (though preoperative asymmetries will persist). The surgically enlarged breasts do not move in the same way as normal breasts. They tend to be firmer. The contours are usually somewhat different than normal breasts. In some patients these discrepancies may be rather noticeable. Although every effort is made to place the implants symmetrically, complete symmetry is rarely achieved. Immediately after surgery, the breasts are swollen and firmer. The final shape and size is approximated after 2 to 3 months, but up to one year may be required for the end result. Initial discomfort is controlled with oral medication. Sutures dissolve in 7 to 14 days. Light activities can be resumed as tolerated. Light exercise can be started in about 2-3 weeks, and strenuous exercise after 6 weeks. Your doctor may require you to move or massage the implants within the breast pockets during the postoperative period. Textured implants do not require breast massage. See you Plastic Surgeon if concerned or the pain does not diminish.