In the shoulder joint, there are bursae, which are located between the bony prominences near the joint and the tendons and muscles. They have the functions of cushioning and lubricating the shoulder joint. When there are repetitive movements, improper postures, or long - term strain, problems such as redness and heat will occur, leading to shoulder pain. Just relying on pain relief measures often results in frequent relapses. To completely cure the problem, it is necessary to target and eliminate the redness and heat of the bursae. For product details, please refer to the instructions on the packaging. The pictures are for reference only, and everything shall be subject to the actual product.