Breast implant surgery complications can include capsular contracture, implant rupture, infection, and shifting. Signs and symptoms include hardness, pain, swelling, asymmetry, rippling, or redness. Ruptured implants may cause deflation (saline) or silent rupture (silicone). Infection can lead to fever and persistent pain. If complications arise, seek immediate medical evaluation. Non-surgical treatments like ultrasound or medication can help mild cases, while severe issues may require implant removal or replacement.