After a hyaluronic acid buttock modelling procedure, it is important to follow the doctor's instructions for optimal skin healing. It is usually recommended to avoid strenuous exercise and to limit long sitting on the buttocks for a few days after the procedure to prevent displacement of the injected hyaluronic acid. In addition, it is advisable to use ointments or creams prescribed by the doctor for skin care and to avoid saunas, swimming pools and hot baths for a few days. If you experience any worrying symptoms, contact your doctor immediately.