Hi, thanks for writing to HCM. The symptoms in your description are typically suggestive of COCCYDYNIA, which implies pain arising in and around the tail bone (coccyx). This condition is caused by an injury or stress that affects the tailbone, as well as the muscles and nerves surrounding it. In your case, prolonged sitting on hard surface in the cause. The general treatment guidelines for this condition includes - * Sit completely upright with proper posture — keeping your back firmly against the chair, knees level with your hips, feet flat on the floor and shoulders relaxed * Sitz baths (which involves soaking hips and buttocks in warm water) * Lean forward while sitting down * Sit on a doughnut-shaped pillow or wedge (V-shaped) cushion * Apply heat or ice to the affected area *Physical therapy involving strengthening of pelvic area muscles , stimulation with ultrasound therapy * Take over-the-counter pain relievers, such as acetaminophen (Tylenol), ibuprofen (Advil) Hope this information is helpful. Good day