Intra-abdominal abscess treatment can be of different types. An intra-abdominal abscess is the collection of infected fluid or pus in the abdominal cavity. This can be drained by surgical and non-surgical methods. Antibiotics can be used to treat the abscess without any surgical methods. But sometimes the antibiotics are not enough and surgical methods are used for the treatment. A catheter is inserted into the body to directly remove the abscess.