Sumo 15Gm Gel is used to relieve acute musculoskeletal pain and joint pain due to osteoarthritis. It reduces pain, swelling, and joint stiffness, thereby improving your ability to move and flex the joint. It works by first cooling the skin and then warming it up, which interferes with the pain signal transmission through nerves. It blocks the release of chemical messengers that causes pain and inflammation with redness and swelling. It may cause some common side effects such as burning, itching, redness, stinging, and dryness on your skin at the application site. Before using this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.