Breast implant surgery complications can include capsular contracture, implant rupture, infection, and breast implant illness (BII). Signs include pain, swelling, hardness, asymmetry, rippling, or unexplained fatigue. If complications arise, consult a plastic surgeon immediately. Imaging like MRI or ultrasound can confirm issues. Treatments include medications, implant removal, or corrective surgery. For mild cases, massage and compression may help.