Pain: Pain is a symptom triggered by the nervous system, causing uncomfortable sensations in the body. Pain may be dull or sharp; it might be constant or may come and go. The common causes of pain include headache, muscle strain, cramps, cuts, bone fractures and arthritis.
Osteoarthritis: It is a joint disease in which the two ends of the joints come together due to the breakdown of a protective covering of cartilage. Due to the absence of this protective covering, the joints rub against each other, leading to pain and stiffness. Symptoms include pain, stiffness, inflammation and tenderness.
Rheumatoid arthritis: It is an auto-immune disease (the body's immune system attacks its tissue), leading to joint pain and damage. Symptoms of rheumatoid arthritis include pain, swelling, stiffness, deformities and loss of joint function.
Ankylosing spondylitis: It causes pain and stiffness in the spine. The pain generally starts in the lower back and can spread to the neck, damaged joints or other body parts. Ankylosing spondylitis includes decreased flexibility which usually leads to hunched-forward posture and pain in joints.
Gout: It is caused due to deposits of uric acid crystals in the joints, which leads to pain and inflammation in the joints. Symptoms include pain, swelling and redness in the joints, mostly the big toe.