It is clear case of inter-vertebral discs involvement. Your lower lumbar and/ or Coccygial vertebra are exerting pressures on nerves emanating from those regions. Where ever these nerves supply, pain is felt. Pressure could be due to various regions. IVD gaps reduced due to degeneration, trauma etc or osteophytes grown due to age/ ors. Pain killers is no solution. Try physiotherapy and better to do Yoga postures. Warm water treatment over the region while bathing ( pour warm water). Then apply some natural relaxant. To my own patients I successfully recommend Rumalya herbal liniment for very gentle massage. Rumalya forte tab also give strength to muscles and joints. Both are pure non toxic Ayurveda products. Hope it helps you. Once you start following instructions, we will tell you what to eat and what to avoid as per Ayurveda and Yoga principles with logic behind it. Happy relaxed days ahead.