Increased signal of the anterior talofibular ligament is a manifestation of the anterior talofibular ligament on MRI when the ankle joint is MRI’d, and its increased signal is often indicative of an injury to the anterior talofibular ligament. The anterior talofibular ligament is an important ligament of the ankle joint, and it is very important for maintaining the anterior stability of the ankle joint. Injury to the anterior talofibular ligament is common in ankle sprains or external violent injuries resulting in ligament injuries, which can often occur in ankle swelling, can also occur in the ankle joint forward instability, the MRI examination can be seen in the anterior talofibular ligament signal increase, the severity of the signal will be fracture or lack of signal, which suggests that there is a complete rupture of the anterior talofibular ligament. In most cases, the increased signal of the anterior talofibular ligament is an incomplete injury, and ankle braking is needed to facilitate the repair of the anterior talofibular ligament.