A long-term inflammation of the bursa at the ischial tuberosity, often caused by extended periods of sitting on hard surfaces. This leads to irritation of the ischial tuberosities (two bones in the buttocks) and subsequent swelling and pain in the bursae over these bones, rendering sitting extremely painful. This condition used to be prevalent among handloom weavers, who often sat on hard benches, and basket weavers, who typically worked while sitting cross-legged on the floor.