Symptoms of hair loss include hair loss in patches usually in circular patterns, dandruff, skin lesions, and scarring.

脱发的症状主要包括周期性的局部脱发，头皮屑增多，头皮损伤，还有伤疤。

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Learn about the causes of hair loss, and what you can do to prevent hair loss.

了解的原因，脱发，和你可以做什么，以防止脱发。

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It has demonstrated the ability to help stop hair thinning and hair loss, and promotes hair growth in men with mild - to - moderate hair loss.

它被证明具有阻止头发稀疏和脱落的能力，并促进患有轻微至中等程度脱发的男士的头发再生。

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Inflammatory and hair loss conditions of the scalp are rare but can also cause itching.

CNN: Why is my scalp so itchy?

But the prevalence of diet products and hair loss remedies gives rise to the impression that infomercials sell a lot of shoddy wares.

FORBES: The Infomercial Triumphant

Vomiting and hair loss occur at 70 rem and 75 rem respectively, while exposure to 400 rem can mean possible death in two months.

WSJ: Radiation's Effect Depends on Amount