The prevalence is greater in sports activities and actions with repetitive plantarflexion together with ballet, soccer, downhill operating. Any ankle trauma can provoke or exacerbate the situation. Nearly three quarters of sufferers report an acute ankle damage because the initiating reason for signs . Signs of os trigonum syndrome embrace stiffness, notably whereas in plantar flexion, continual ache, and swelling behind the ankle. Ache happens throughout particular coaching, specifically 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 toes with the ankle in maximal plantar flexion) positions in ballet, or any sports activities motion involving compelled plantar flexion or push-off. Signs sometimes diminish initially with relaxation from the triggering exercise.