There are many types of alopecia (baldness or hair loss), each with a different cause. Alopecia may be localized to the front and top of the head, as in common male pattern baldness. It may be patchy, as in a condition called alopecia areata. Or it can involve the entire head, as in alopecia capitis totalis (also called alopecia totalis), and it can involve hair loss of the entire body, such as in alopecia universalis. Alopecia can be caused by medications, such as from chemotherapy for cancer. It can also be a result of an underlying disease, such as with an underactive thyroid gland (hypothyroidism) and systemic lupus erythematosus. Alopecia may have no symptoms other than the loss of hair, or it can be associated with itching and/or rash of the scalp.
The word alopecia comes from the Greek alopex for "fox." Foxes are less furry when afflicted with a skin disease (the "mange") that causes them to lose their hair. When a fancier word for "baldness" was sought, the mangy fox supplied it -- "alopecia" or, if you wish, "fox-mange" -- not a very positive image to associate with baldness!
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Causes of Hair Loss
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Graft Versus Host Disease (GVHD)
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Lupus (Systemic Lupus Erythematosus or SLE)
Systemic lupus erythematosus is a condition characterized by chronic inflammation of body tissues caused by autoimmune disease. Lupus can cause disease of the skin, heart, lungs, kidneys, joints, and nervous system. When only the skin is involved, the condition is called discoid lupus. When internal organs are involved, the condition is called systemic lupus erythematosus (SLE).
Peripheral Vascular Disease
Peripheral vascular disease (PVD) refers to diseases of the blood vessels (arteries and veins) located outside the heart and brain. While there are many causes of peripheral vascular disease, doctors commonly use the term peripheral vascular disease to refer to peripheral artery disease (peripheral arterial disease, PAD), a condition that develops when the arteries that supply blood to the internal organs, arms, and legs become completely or partially blocked as a result of atherosclerosis. Peripheral artery disease symptoms include intermittent leg pain while walking, leg pain at rest, numbness in the legs or feet, and poor wound healing in the legs or feet. Treatment for peripheral artery disease include lifestyle measures, medication, angioplasty, and surgery.
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Scalp Psoriasis (Psoriasis of the Scalp)
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