Hot/Cold Pack Therapy is a simple yet effective physiotherapy technique that uses temperature to treat pain, inflammation, and muscle stiffness. Cold packs (cryotherapy) are applied to reduce swelling, numb acute pain, and control inflammation, especially in the first 24–48 hours after an injury. Hot packs (thermotherapy) are used to relax tight muscles, improve blood flow, and ease chronic pain or stiffness. This therapy is widely used for conditions like sprains, arthritis, back pain, and sports injuries. It is safe, non-invasive, and often combined with other physiotherapy treatments to accelerate healing and restore mobility in affected areas.