A joint is where two or more bones meet. Any joint on the body can cause discomfort, sometimes called arthritis or arthralgia. The severity of joint range from mild to severe. Mild joint pain only causes some soreness when you move the join, severe joint pain can make it impossible to move your joint. Rarely is joint pain an medical emergency, most cases can be managed at home.

Causes

Adult Still’s disease
Muscle strains
Avascular necrosis
Bone cancer
Broken bone
Bursitis
Complex regional pain syndrome
Dislocation
Fibromyalgia
Gout
Hemochromatosis
Hypothyroidism (underactive thyroid)
Juvenile rheumatoid arthritis
Leukemia
Lupus
Lyme disease
Osteoarthritis
Osteomalacia
Osteomyelitis
Paget’s disease of bone
Pseudogout
Psoriatic arthritis
Reactive arthritis
Rheumatoid arthritis
Rickets
Sarcoidosis
Septic arthritis
Sprains and strains
Tendinitis
Although there are many possible causes for joint pain, there are still some common symptoms to watch out for.

Swelling
Redness
Tenderness and warmth around the joint

Seek immediate medical attention if:

Joint deformity
Inability to use the joint
Intense Pain
Sudden Swelling