Upper arms, and working around the elbow

The upper arm is easy to reach, easy to see, and divides cleanly into a part that tolerates firm work and a part that should be left alone. The outside and the back are the working surfaces; the inner arm, the armpit and the immediate area of the elbow are not.

It is a modest region rather than a dramatic one, and it is worth knowing mostly because people working a stiff shoulder tend to drift down onto it without a plan.

The map

The shoulder cap. The rounded muscle over the point of the shoulder, running a hand’s width down the outside of the arm. Substantial and tolerant through its middle. The bony point at the very top of the shoulder is not — you can feel it as a hard ridge, and it is a boundary.

The back of the upper arm. The muscle at the rear, between shoulder and elbow. Reachable with the opposite hand, tolerant, and unremarkable to work. It thins into tendon as it approaches the elbow.

The front of the upper arm. The muscle at the front takes light to medium work through its middle. It is more sensitive than the back and there is less reason to go there.

The inner upper arm. Thin skin, sensitive, with vessels and a nerve running close to the surface along the inner groove. Light at most, and skipping it entirely is a reasonable choice.

The armpit. Not a gua sha region at all. Vessels, nerves and lymph nodes in a small space with almost nothing over them.

The elbow. The point at the back and the knobs on either side are bare bone under skin. The inner knob has a nerve passing over it, which is why knocking it produces that particular electric feeling. The soft hollow at the front of the elbow contains vessels close to the surface. All of it is a no-go.

Working it

Let the arm hang or rest it across your body. An arm held up is working, and a working muscle gives you a false reading of both its tension and its tolerance.

Strokes run down the arm, shoulder toward elbow. Following the length of the muscle, one direction, lifting and returning.

Start below the bony point of the shoulder and finish well above the elbow. A hand’s width clear at the bottom is not excessive.

Shorter contact than on the back or thigh. The arm is narrow and rounded, so a long straight edge bridges the curve. Follow the contour with a shorter band, which is a grip adjustment.

Medium pressure. More than a forearm tolerates, less than a shoulder slope. The upper arm marks visibly and in a place other people will see, which is worth factoring into when you do it.

No strokes across the collarbone or the front of the shoulder. The collarbone is bare bone along its whole length, and the hollow just below it at the front is not a region for a stone. Work the outside and the back of the arm and leave the front of the shoulder alone.

THE STROKE — upper arm

  · Arm relaxed, hanging or resting across the body
                          → before anything else
  · Shoulder cap: down the outside of the arm
                          → tolerant through the middle
  · Back of the arm: down toward the elbow
                          → stop a hand's width short
  · Medium pressure
                          → more than forearm, less than traps
  · The bony point at the top of the shoulder
                          → NO. Boundary.
  · Armpit, inner arm groove, any part of the elbow
                          → NO. Vessels and nerves near skin.

Where this region borders another

The shoulder cap sits directly below the slope of the trapezius, and the two get conflated. They are different regions with different tolerances: the trapezius takes the most pressure of anywhere on the upper body, and the arm below it takes less. A stroke that begins on the trapezius and continues down the arm crosses the bony point of the shoulder on the way, which is precisely what to avoid.

Work them as two regions, with a gap between them.

What can and cannot be said about it

Firm manual work on a stiff upper arm commonly feels like it helps, which is the same statement this site makes about every region, because it is the only statement the evidence supports. There is no established effect on strength, recovery, range of movement or any condition of the shoulder or elbow.

Shoulder pain that limits movement, elbow pain that persists, and any numbness, tingling or weakness running into the hand are clinical questions. Scraping them is at best beside the point.

Any lump you cannot account for — in the armpit, above the collarbone or anywhere else — is a reason to see a doctor and not a reason to work the area. Do not scrape over it, and do not try to work out what it is yourself.

What the tradition says

Traditional practice describes routes running the length of the arm, and scraping along the arm belongs to that framework in its own terms. Some lineages treat the arm as a secondary region worked after the upper back.

That is the tradition’s account and it is given as the tradition’s. It is not physiology, and none of it is established. The map above is what you can confirm with your fingers, which is the standard this site holds itself to.

Cautions

Stay off the point of the shoulder, every part of the elbow, the inner groove of the upper arm and the armpit entirely.

Do not work over broken, irritated or sunburnt skin, moles, lesions or rashes, recent surgery or injury, infected or actively inflamed areas, varicose veins, or any unexplained lump or swelling.

Do not do this at all with a bleeding disorder or on anticoagulant medication. If you have had lymph nodes removed or treated on that side, or you are having or have recently had cancer treatment, ask the treating team rather than deciding from an article. If you are pregnant, have a skin condition, or are unsure, ask a clinician first — and read when not to scrape alongside this.