Shoulder pain can worsen during cold weather due to several factors related to temperature and changes in the body’s response to cold conditions.

• Muscle Stiffness: Cold weather causes muscles and tendons to contract, making them tighter and less flexible. This can lead to increased stiffness in the shoulder area, especially if there’s an existing injury or condition like arthritis. When muscles are stiff, they are more prone to strains or discomfort, making shoulder pain worse.
• Reduced Blood Flow: In colder temperatures, the blood vessels constrict, which reduces circulation to the muscles and joints. Reduced blood flow can make the shoulder muscles feel tense and sore, particularly for people with conditions like rotator cuff injuries, frozen shoulder, or osteoarthritis.
• Less Physical Activity: In cold weather, people tend to be less active, which can result in muscles becoming weaker or less flexible. Inactivity can make the shoulder joint more vulnerable to injury or pain. Additionally, when the body is less active, the natural lubricants in the joints (synovial fluid) decrease, which can increase friction and lead to discomfort.
• Pressure Changes: During the monsoon, the atmosphere often experiences changes in pressure due to storms and shifting weather patterns. These changes can affect the joints, especially in areas like the neck and spine, causing discomfort or worsening existing pain conditions like cervical spondylosis or herniated discs.
• Barometric Pressure Changes: Cold weather often comes with drops in barometric pressure, which can affect joints, especially those already dealing with inflammation, like in arthritis. The pressure changes can cause swelling and pain in the shoulder joints, making them feel more stiff or achy.