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What causes hair loss? 19 possible conditions

The American Academy of Dermatology (AAD) notes that 80 million men and women in America have hereditary hair loss (alopecia). It can affect just the hair on your scalp or your entire body. Although it’s more prevalent in older adults, excessive hair loss... Read more

See a list of possible causes in order from the most common to the least.

1

Male Pattern Baldness

Male pattern baldness, also called androgenetic alopecia, is the most common type of hair loss in men. It typically begins at the temples or crown of the head and recedes.

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2

Alopecia Areata

Alopecia areata is an autoimmune disease that causes hair to fall out in round patches. Learn about its symptoms, causes, and treatment.

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3

Hypothyroidism

The thyroid gland produces a hormone that controls how your cells use energy (metabolize). Hypothyroidism occurs when the body doesn't produce enough. Untreated, it can cause complications like obesity and heart disease.

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4

Nutritional Deficiencies (Malnutrition)

A nutritional deficiency occurs when the body doesn't absorb the necessary amount of a nutrient. Deficiencies can lead to a variety of health problems.

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5

Hyperthyroidism

The thyroid gland produces a hormone that controls how your cells use energy. Hyperthyroidism occurs when the body produces excessive amounts.

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6

Acute Stress Disorder

Acute stress disorder (ASD) may develop after a traumatic event, and it can last up to one month. Learn about the symptoms of ASD.

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7

Lichen Planus

Lichen planus is a common skin rash that is not contagious. Common symptoms may include lesions in the mouth, which may cause a burning sensation.

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8

Hodgkin's Disease

Learn more about a type of blood cancer called Hodgkin's disease (HD), including its symptoms, causes, diagnosis, and treatments.

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9

Underactive Pituitary Gland (Hypopituitarism)

Hypopituitarism occurs when your pituitary gland in your brain is not releasing one or more of the eight hormones it should be releasing.

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10

Syphilis

Syphilis is a sexually transmitted infection. It is caused by a type of bacteria known as Treponema pallidum. According to the Centers for Disease Control and Prevention, in 2006, more than 36,000 cases of syphilis wer...

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11

Hashimoto's Disease

Hashimoto's disease is a condition that damages the thyroid's ability to function properly. It can cause a goiter, or enlarged thyroid, which can make the front of the neck look swollen.

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12

Systemic Lupus Erythematosus

Systemic lupus erythematosus, the most common form of lupus, is a chronic autoimmune disease that can cause severe fatigue and joint pain. Learn more about it.

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13

Addison’s Disease

Addison's disease occurs when the adrenal cortex is damaged and the adrenal glands do not produce enough of the steroid hormones cortisol and aldosterone.

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14

Systemic Sclerosis (Scleroderma)

Systemic sclerosis (SS) is an autoimmune disorder in which the body's immune system attacks the body.

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15

Celiac Disease (Gluten Intolerance)

Celiac disease is a digestive disorder caused by an abnormal immune reaction to gluten. Learn about celiac disease systems, diagnosis, and treatment.

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16

The War of Cells: Graft vs. Host Disease

Graft vs. Host Disease (GvHD) is a reaction that develops after a bone marrow transplant when the donor and the recipient are different people.

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17

Ito Syndrome (Incontinentia Pigementi Achromians)

Ito syndrome (IS) is a rare condition that researchers believe iscaused by genetic irregularities. The conditionis not inherited, however,and a family history of IS is rare. IS is characterized by loss of skin color o...

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18

Leishmaniasis

Leishmaniasis is a parasitic disease caused by the Leishmania parasite found in sand flies.

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19

Bamboo Hair (Tricorrhexis Nodosa)

Bamboo hair is a condition that causes your hair strands to develop bumps and look like the knots in a bamboo stalk. Read more about it.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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