Abdominal adhesions are bands of scar tissue that form between abdominal tissues and organs, causing them to stick together. These vary from a consistency of wet tissue paper, which are of little significance, to a strong, fibrous band that can readily cause obstruction. Normally, internal tissues and organs have slippery surfaces, which allow them to shift easily as the body moves. Adhesions cause tissues and organs to stick together.
Although most adhesions go unnoticed, the most common symptom is chronic abdominal or pelvic pain. The pain often mimics that of other conditions, including appendicitis, endometriosis, and diverticulitis.
William C. Shiel, M.D., Abdominal Adhesions (Scar Tissue in the Abdomen), Medicine Net, https://www.medicinenet.com/abdominal_adhesions_scar_tissue/article.htm#facts