I have been experiencing pain in my back and lower back joints, especially on the left side. There is a capsule-shaped lump near my left lower back/waist area. It has been present for about one year, has not increased in size, and moves slightly when touched. It is painful when pressed. My back pain increases when sitting for a long time but improves with walking and exercise. I also have a persistent throat problem. It feels like there is a wound or ulcer inside my throat. Additionally, I suffer from constipation and excessive gas. I would like a proper medical evaluation to identify the causes of these problems and get appropriate treatment.