Yes, Nizer gel is an appropriate medicine for your ankle pain. It contains Nimesulide, a topical anti-inflammatory drug (NSAID) that effectively reduces localized pain and swelling. Pain in the back of the ankle is commonly caused by Achilles tendinitis or a muscle strain, and applying this gel directly to the painful area provides targeted relief with minimal side effects. Gently apply a thin layer to the affected area 2 to 3 times daily. Do not apply it on open wounds. To support recovery, rest your ankle, apply ice, and avoid strenuous activities. If the pain persists or worsens after a few days, please consult your doctor for a physical assessment.