Arthritis occurs due to many reason like old age. In arthritis their is increased friction of joints which lead to inflammation of joints.They are multiple forms of artheritis like osteoporosis, rheumatoid artheritis, still's disease, septic artheritis, gout etc. The main feature of all the form is that disease is primarly characterised by joint pain. The reasons of the pain can vary between different forms. It can be due to decreased level of sanovial fluid, injury to joint muscles, increased friction of joint etc.
Gout occurs due to accumulation of uric acid crystals in the joints and causes in inflammation of joints which results in inflammation of joints and pain. Gout it self is a form of artheritis. The primary cause of pain is accumulation of uric acid which is not seen in other forms of artheritis.