(Question) Is cupping therapy effective for shoulder pain?

Among the left and right, especially the right shoulder, it hurts even with a little strain, so I always suffer.

The pain continues continuously along the neck, shoulders, and shoulder blades. Would cupping therapy be effective in this case?

I've received a lot of Western medical treatments, but I'm curious if traditional Korean medicine also shows quick results.

And after cupping therapy, the treated area is left with marks, you know. The round, red, blood-spot marksㅠㅠ

How long do those marks usually take to disappear? Since it's summer and I wear short clothes often, I'm curious.

I'm curious if effects appear after just one treatment, and please let me know if you've had a lot of cupping therapy.