Frozen shoulder, or adhesive capsulitis, is a common condition that significantly affects shoulder joint movement. It typically begins with a gradual onset of dull, aching pain that worsens over time. This pain, which is often more severe at night, can disrupt sleep. As the condition progresses, stiffness and a restricted range of motion set in, limiting the ability to perform daily activities. Eventually, the pain becomes more persistent, and joint movement becomes increasingly limited.