Meniscus injury is a common sports injury, which can cause pain, popping and limpness during joint activities, and is more obvious when going up and down stairs, especially when descending stairs. Therefore, for patients who still have pain and swelling 3 weeks after knee injury, it is recommended that an MRI of the knee be performed for professional advice from a bone and joint specialist. For treatment, there is a minimally invasive procedure that can be done with minimal damage and fast recovery. The cost of a simple meniscal injury is about $4,000-5,000.