The oblique muscles are often thought of as the waist muscles. They contribute to pain on your side in the rib cage and waist area, lower abdomen, groin, and pelvis. They can also contribute to heartburn, indigestion, bladder pain and incontinence, and testicle pain.
The latissimus dorsi muscle can contribute to pain in the shoulder, upper back, and arm going down into the hand. The muscle can also cause pain in the side of the ribcage and lower abdomen. It is the muscle that most often causes the 'side stitch'.
The levator scapulae connect the shoulder blade to the vertebra of the neck. The muscle contributes to pain in the shoulder, neck, and the base of the skull. The muscle causes a stiff neck. It can contribute to headaches at the base of the skull and up into the back of the head.
The pectoralis minor muscle contributes to pain in the chest, shoulder, arm, hand, and fingers. Chest pain can be tenderness or sharp, burning stabbing pain. The pec minor can also contribute to pain in the upper back between the shoulder blades.
The pectoralis major contributes to pain in the chest, shoulder, breast and upper back. Pain can also travel down the inner arm, elbow and extend to the hand and last two fingers.
The infraspinatus muscle lines the back of the shoulder blade. It is one of the muscles that can contribute to frozen shoulder. The muscle can cause pain in the shoulder, neck, pain down the outside of the arm which descends down into the thumb and hand. Shoulder mobility can be greatly reduced.
The subscapularis muscle is found on the inside of the shoulder blade. It can cause severe pain in the shoulder blade area that can also run down the back of the arm. Pain is also often felt in the wrist, but not the forearm.
The serratus anterior muscle contributes to pain down the side of the ribs, around the shoulder blade, chest, arm, hand, and fingers.
The rhomboids consist of two muscles, the rhomboid major and the rhomboid minor. They are located in the upper back and contribute to pain around the inner edge of the shoulder blade.
The serratus posterior superior muscle is a muscle found in the upper back. It contributes to pain in the shoulder, shoulder blade region, arm, hand and little finger. It can also contribute to pain in the upper chest.
The rectus abdominis contributes to pain in the area around the sternum, across the upper back, across the buttocks, the lower abdomen, the pelvis. and testicles. It can also contribute to heartburn, indigestion, feeling bloated as well as mimicking urinary tract infection pain.