Union of two tissue surfaces. Also, scar tissue that can form in the area of a previous operation.

Adhesions are scar-like tissues that form between two surfaces inside the body. Surgery, inflammation, or injury can cause tissues to bond to other tissue or organs, similar to the forming of scar tissue. Adhesions can also form between the two surfaces. Surgery may be done to allow normal movement of the organ and reduce symptoms caused by the adhesion. However, there is a risk for more adhesions as the number of surgeries increase