What Causes Sudden Hair Loss for Men: Understanding the Root Causes

WrittenbyLuat Duong
Last updated

Experiencing sudden hair loss can be a disconcerting experience for any man. From genetic factors to lifestyle choices, various reasons could contribute to this unexpected change. This article aims to shed light on the common causes of sudden hair loss in men and the ways to tackle it.

What Causes Sudden Hair Loss for Men?

The main causes of sudden hair loss in men can include male-pattern baldness, stress, certain medical conditions, nutritional deficiencies, and physical or emotional shock, such as severe weight loss or fever. Some medical treatments, like chemotherapy, can also contribute to hair loss (source, source, source).

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Male-Pattern Baldness

Male-pattern baldness is the most common cause of hair loss in men. It typically manifests as a receding hairline followed by thinning of the hair on the crown and temples. Genetics plays a crucial role in this, so if your father or other male relatives have experienced hair loss, you're more likely to do so too (source).

Stress and Medical Conditions

Stress, both physical and emotional, can lead to temporary hair loss. Conditions like telogen effluvium can cause hair to shed more than usual during periods of stress. Additionally, certain medical conditions like thyroid issues or autoimmune diseases can lead to hair loss (source).

Nutritional Deficiencies and Lifestyle Factors

Lack of certain nutrients like vitamin A or selenium may increase the risk of hair loss. Lifestyle factors such as sudden or excessive weight loss, harsh hair treatments, and certain hairstyles that pull on the hair (like tight ponytails or braids) can also contribute to hair loss (source, source).


Understanding the causes of sudden hair loss for men is the first step to addressing the issue. Whether it's due to male-pattern baldness, stress, medical conditions, nutritional deficiencies, or lifestyle factors, it's always recommended to consult with a healthcare provider to understand the underlying cause and appropriate treatment options.

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Luat Duong

Luat Duong is a Copenhagen-based writer and content strategist specializing in hair loss and health. His work has been featured in MyHealthGuide, The Right Hairstyles, and Woman's Era. He is a graduate of Vaasa University. You can connect with him on LinkedIn.