The scars need massaging with special healing cream.
Your breasts may become hard immediately after the op but should soften.
Massage your breasts daily with nourishing cream to keep the skin supple and prevent capsular contracture (a complication where scar tissue becomes tight and squeezes the implant). The more you move your breasts the better.
You need time to adapt to your new, heavier breasts. It's advisable to wear a sports bra for several months.