Lupus is a long-lasting autoimmune
disease in which the immune system attacks normal body tissues as though they
were foreign substances. It may cause joint pain.
Gout is an inflammatory joint disease that causes
acute pain and swelling. It is a form of arthritis that develops when uric acid
crystals form in and around the joints, commonly affecting the big toe
Raynaud's phenomenon is a condition in
which some areas of the body, usually the fingers or toes, have an extreme
response to cold temperature or emotional stress. During an attack of
Raynaud's, the blood vessels in the affected areas tighten, severely limiting
the flow of blood to the skin, causing numbness, tingling, swelling, pain,
and pale color.
Infection can cause pain, redness, and
swelling that occur with red streaking, heat, fever, or the drainage of pus. An
infection often causes tenderness to the touch or pain with movement at the
site of the infection.