Miner reported to GF and medic on 2/1/2015, of slight pain in his lower back; he refused treatment. Miner was treated by the on-site medic on 2/2/2015; refused treatment. Miner said the pain continued to get worse and was taken to town to be treated on 2/5/2015. Miner is not sure what caused the pain to start but thinks it may have been from moving a pump.