What causes excessive white hair on the top of the head?

Generally speaking, an increase in white hair on the scalp may be caused by factors such as aging, excessive psychological stress, malnutrition, hypothyroidism, or vitiligo. It is recommended to seek timely medical attention to identify the underlying cause and receive appropriate treatment under the guidance of a qualified physician. Specific explanations are as follows:

1. Aging: As people age, cells in the body gradually deteriorate. The function of melanocytes in hair follicles may progressively decline, leading to insufficient melanin production and an increase in white hair. This is a normal physiological phenomenon and generally does not require excessive concern.

2. Excessive Psychological Stress: Prolonged exposure to stress, anxiety, or tension may lead to brain fatigue, which can impair the normal function of melanocytes, resulting in a sudden increase in white hair. It is advisable to spend more time outdoors, socialize with others, and engage in relaxing activities to help alleviate these symptoms.

3. Malnutrition: Long-term dietary imbalances or picky eating habits may lead to nutritional deficiencies, particularly in essential nutrients such as copper, iron, and vitamin B12. This may reduce melanin synthesis, thereby increasing white hair on the scalp. Malnutrition may also present with other systemic symptoms such as fatigue and pallor. Patients are advised to consume more foods rich in these nutrients, such as pork blood, pork liver, and spinach, which may help relieve symptoms.

4. Hypothyroidism: This condition may be related to thyroid damage or excessive iodine intake, leading to abnormal thyroid function and hormonal imbalance, which can impair melanocyte activity and result in increased white hair on the scalp. Additional symptoms may include weight changes and irregular heart rate. Patients should follow medical advice and take medications such as levothyroxine sodium tablets, thyroid tablets, or alfacalcidol soft capsules as prescribed to improve their condition.

5. Vitiligo: This may be associated with genetic factors or chemical irritation. In addition to increased white hair on the scalp, patients may also experience spreading white patches on the skin. Treatment should follow medical guidance and may include medications such as prednisone acetate tablets, halometasone cream, or tacrolimus ointment.

In daily life, it is recommended to maintain a balanced diet, increase intake of foods rich in melanin—such as black sesame seeds and black-boned chicken—and ensure adequate sleep, all of which may help alleviate symptoms.