If your surgical wound becomes infected, the area is more likely to become weak. You may also get a hernia next to a stoma. A stoma is an opening in your abdomen that drains stool from your bowels. Muscle strain: Heavy lifting and pregnancy can strain the muscles in your abdomen.
WHAT THEY DO... Active trigger points cause muscle pain. Latent trigger point can cause stiffness in a muscle. Triggers are created by a protective mechanism in your body - a message that tells a muscle to tighten up to prevent further damage.
The following events or activities may activate or reactivate the rectus abdominis trigger points: 1  New or intense abdominal exercise program. 2  Punching or kicking from cardio-kickboxing or martial arts class. 3  Visceral disease such as peptic ulcer or intestinal parasite.  Abdominal surgery 1  scar. Impact trauma to the abdomen.