The prevalence is increased in sports activities and actions with repetitive plantarflexion together with ballet, soccer, downhill working. Any ankle trauma can provoke or exacerbate the situation. Nearly three quarters of sufferers report an acute ankle damage because the initiating reason behind signs [5]. Signs of os trigonum syndrome embrace stiffness, significantly whereas in plantar flexion, power ache, and swelling behind the ankle. Ache happens throughout particular coaching, particularly pointe (dancing carried out on the tip of the toes with the ankle in maximal plantar flexion) and demipointe (dancing carried out on the balls of the ft with the ankle in maximal plantar flexion) positions in ballet, or any sports activities motion involving compelled plantar flexion or push-off. Signs usually diminish initially with relaxation from the triggering exercise.