Yes, diabetes may cause hair loss. In diabetes, excess sugar builds up in the blood damaging the blood vessels which consequently are not able to carry enough oxygen. This in turn causes hair follicle damage and loss of hair. Diabetes also causes hair loss called alopecia areata which occurs when body's own immune system starts attacking the healthy hair follicles. Hair loss may occur in patches and may affect hair in other body parts as well, such as eyebrows and eyelashes. Stress during diabetes may also act as a factor in hair loss.

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