Fenlong Roll On contains Diclofenac 37.4mg, a nonsteroidal anti-inflammatory drug (NSAID) used topically to relieve pain and reduce inflammation in conditions such as muscle aches, joint pain, sprains, strains, and arthritis. The roll-on formulation allows for easy, targeted application directly to the affected area, providing fast-acting relief without the need for oral medication. Diclofenac works by inhibiting cyclooxygenase enzymes (COX-1 and COX-2), which play a key role in the production of prostaglandins, substances responsible for pain and inflammation. Fenlong Roll On is absorbed through the skin, delivering the active ingredient locally to reduce swelling, stiffness, and discomfort. It is particularly useful for individuals seeking localized treatment with minimal systemic exposure, reducing the risk of gastrointestinal side effects commonly associated with oral NSAIDs. Users should apply the roll-on gently to clean, dry skin, avoiding broken or irritated areas, and wash hands after use. Fenlong Roll On is intended for short-term use and should not be applied to large skin areas or used under occlusive dressings unless directed by a healthcare professional. Consult a doctor before use if you have allergies, skin conditions, or are pregnant or breastfeeding. Discontinue use and seek medical advice if irritation or rash develops.