After fat filling, you should not blindly take collagen orally. If you only take collagen before and after the operation, it will cause excessive accumulation of collagen fibers supplemented by the outside world and released from the subcutaneous interior, and granulation tissue will appear in the connective tissue until it becomes scar tissue, leading to large-scale malignant proliferation of sweat glands, meridians, blisters, tissues and cuticles in the skin, and adverse reactions such as subcutaneous necrosis, erythema and swelling. Sok Li will tell you all these precautions.