Deltoid
Body region：Shoulder
Outer shoulder ache, weakness when lifting the arm
Function
Originates from the outer clavicle, the acromion and the scapular spine, and inserts at the deltoid tuberosity of the humerus. Responsible for raising, bending forward and extending the arm.
Common causes
Repeated arm raising, carrying heavy loads, excessive exercise or poor posture.
Massage and stretching
- Knead the muscle belly
- Stretch across the chest
Related acupoints
- Jianyu (LI15)：Depression below and in front of the acromion when the arm is raised horizontally
- Quchi (LI11)：Depression at the outer end of the elbow crease when the elbow is bent
Related meridians
Large Intestine Meridian of Hand-Yangming、Triple Energizer Meridian of Hand-Shaoyang
When to see a doctor：Severe pain when lifting the arm, or night pain that wakes you and keeps getting worse: get it evaluated.