What Causes Pain In The Lower Back?

My father was 78 years old and had a good health to a year ago where he began to gasp when walking and then came back pain at the bottom of his back so that he became standing and walking hard and showed the radiation that he has slipped cartilage in two paragraphs and was feeling strong pain and doctors wrote him many painkillers and now He does not feel pain in the back, but when he puts his head on the head chokes, sleeps and is sitting and his health and physical bad because he does not get up only with his help and walking hardness and sometimes I measured him pressure, hearing the heartbeat is irregular and fast often ,,, Note that has a thyroid gland From one side of many years and the size of eggs and was pleasing Some of them said he had a mild heart deficit and some of them said he had advanced heart failure and valve rebound and said he had peripheral neurotoxinitis and that he had a mild heart deficit. Bisoprlol is now used as a 2.5 mg back pill, a 125 mg digoxin in the morning, a half-pill in the morning, a nucleo cmp forte, and a b-complex). All of these treatments are useless and even worse. From now on, his health has deteriorated gradually and for two months now He has difficulty in speaking and also gradually so that now his voice is dim and tired to speak