Classification
There are several diseases where joint pain is primary, and is considered the main feature. Generally when a person has "arthritis" it means that they have one of these diseases, which include:

Osteoarthritis
Rheumatoid arthritis
Gout and pseudo-gout
Septic arthritis
Ankylosing spondylitis
Juvenile idiopathic arthritis
Stills disease
Psoriatic arthritisJoint pain can also be a symptom of other diseases. In this case, the arthritis is considered to be secondary to the main disease; these include:

Psoriasis
Reactive arthritis
Ehlers–Danlos syndrome
Iron overload
Hepatitis
Lyme disease
Sjögrens disease
Hashimotos thyroiditis
Celiac disease
Non-celiac gluten sensitivity
Inflammatory bowel disease (including Crohns disease and ulcerative colitis)
Henoch–Schönlein purpura
Hyperimmunoglobulinemia D with recurrent fever
Sarcoidosis
Whipples disease
TNF receptor associated periodic syndrome
Granulomatosis with polyangiitis (and many other vasculitis syndromes)
Familial Mediterranean fever
Systemic lupus erythematosus
An undifferentiated arthritis is an arthritis that does not fit into well-known clinical disease categories, possibly being an early stage of a definite rheumatic disease. Signs and symptoms
Pain, which can vary in severity, is a common symptom in virtually all types of arthritis. Other symptoms include swelling, joint stiffness, redness, and aching around the joint(s). Arthritic disorders like lupus and rheumatoid arthritis can affect other organs in the body, leading to a variety of symptoms. Symptoms may include:
Inability to use the hand or walk
Stiffness in one or more joints
Rash or itch
Malaise and fatigue
Weight loss
Poor sleep
Muscle aches and pains
Tenderness
Difficulty moving the jointIt is common in advanced arthritis for significant secondary changes to occur.
Arthroscopic surgery for osteoarthritis of the knee provides no additional benefit to optimized physical and medical therapy. Adaptive aids
People with hand arthritis can have trouble with simple activities of daily living tasks (ADLs), such as turning a key in a lock or opening jars, as these activities can be cumbersome and painful. There are adaptive aids or assistive devices (ADs) available to help with these tasks, but they are generally more costly than conventional products with the same function. It is now possible to 3-D print adaptive aids, which have been released as open source hardware to reduce patient costs. Adaptive aids can significantly help arthritis patients and the vast majority of those with arthritis need and use them. Alternative medicine
Further research is required to determine if transcutaneous electrical nerve stimulation (TENS) for knee osteoarthritis is effective for controlling pain.Low level laser therapy may be considered for relief of pain and stiffness associated with arthritis. Evidence of benefit is tentative.Pulsed electromagnetic field therapy (PEMFT) has tentative evidence supporting improved functioning but no evidence of improved pain in osteoarthritis. The FDA has not approved PEMFT for the treatment of arthritis. In Canada, PEMF devices are legally licensed by Health Canada for the treatment of pain associated with arthritic conditions. Epidemiology
Arthritis is predominantly a disease of the elderly, but children can also be affected by the disease. Arthritis is more common in women than men at all ages and affects all races, ethnic groups and cultures.