Argon plasma coagulation (APC) is a medical procedure used to treat various gastrointestinal conditions by applying ionized argon gas through an endoscope. This procedure generates a high-frequency electrical current that creates a plasma field. The plasma coagulates tissues and blood vessels upon contact, effectively treating abnormalities such as bleeding lesions, tumors, and vascular malformations in the gastrointestinal tract. APC is particularly useful for conditions like gastrointestinal bleeding from ulcers, radiation proctopathy, or angiodysplasia. It offers several advantages including precise targeting of lesions, minimal damage to surrounding healthy tissue, and rapid hemostasis (stopping of bleeding). The procedure is performed under sedation or anesthesia for patient comfort and safety. While generally safe, potential risks include perforation, stricture formation, or gas embolism, which are closely monitored by healthcare providers. APC is a valuable tool in gastroenterology for both therapeutic intervention and palliative care, providing effective symptom relief and improving patient outcomes.