Meniscal strip high signal, commonly seen in MRI reports of the meniscus. The principle of MRI is simply based on the local concentration of hydrogen ions, the higher the concentration of hydrogen ions, the brighter the signal. Hydrogen ions are widely present in fluids and water, and as a result of a meniscal laceration or injury, there will be local bleeding, inflammation, and infiltration of joint fluid, resulting in a large amount of local free fluid and thus a local high signal. Once this is understood, a high signal in the meniscus indicates a striated injury or inflammatory response to the meniscus. The striated signal mainly depends on whether it reaches the joint surface or the joint capsule. If the striated high signal does not reach the articular surface or the joint capsule, then the meniscal injury is usually of primary importance. If it reaches the articular surface or capsule, the injury is at least second degree. Therefore, according to this, the striated high signal is still mainly indicative of first degree injury or mild inflammation. Therefore, it is important to follow the doctor’s instructions for appropriate treatment.