What causes dark skin?
Sep 24, 2024
Source: Cainiu Health
Dr. Yang Ziqi
Introduction
In general, dark skin may be caused by genetic factors, prolonged sun exposure, hormonal changes, adrenal cortical hyperfunction, chronic hepatitis, etc. It is important to pay attention to sun protection in daily life and reduce exposure to ultraviolet radiation; maintain a balanced diet with plenty of vitamin-rich foods; and keep a regular作息 routine, avoiding late nights and excessive fatigue.
Skin darkening is generally caused by prolonged sun exposure, genetic factors, hormonal changes, adrenal cortical hyperfunction, chronic hepatitis, and other factors. If discomfort occurs, it is recommended to seek medical attention promptly. Specific analyses are as follows:
1. Prolonged Sun Exposure
Long-term exposure to sunlight activates melanocytes in the skin through ultraviolet radiation, promoting melanin production and resulting in darker skin. It is advisable to routinely use sunscreen and wear sun-protective hats and long-sleeved clothing.
2. Genetic Factors
Skin pigmentation is largely controlled by genetic inheritance; familial genetic traits may result in naturally darker skin. Increasing intake of foods rich in vitamin C and E can help reduce skin damage caused by ultraviolet radiation.
3. Hormonal Changes
Pregnancy, menstrual cycles, or the use of certain hormonal medications can cause fluctuations in hormone levels, stimulating melanocyte activity and leading to skin darkening. Maintaining good sleep and dietary habits may help balance hormone levels.
4. Adrenal Cortical Hyperfunction
Adrenal cortical hyperfunction is typically caused by excessive secretion of hormones from the adrenal cortex. Increased cortisol levels can promote melanocyte proliferation and melanin synthesis, leading to skin darkening. This condition may be accompanied by symptoms such as muscle weakness and osteoporosis. Patients are advised to follow medical guidance in using medications such as ketoconazole cream, potassium chloride injection, and mifepristone tablets to alleviate symptoms.
5. Chronic Hepatitis
Chronic hepatitis is associated with factors such as viral infection and alcohol-induced liver damage. In patients with chronic hepatitis, impaired liver function affects the endocrine system, particularly hormone metabolism, leading to elevated estrogen levels. Increased estrogen promotes melanin deposition, causing skin hyperpigmentation and darkening. Additional symptoms may include nausea and abdominal bloating. Under medical supervision, patients may receive treatments such as diammonium glycyrrhizinate for injection, silibinin moglate tablets, or reduced glutathione for injection.
In daily life, attention should be paid to sun protection and minimizing ultraviolet exposure; maintain a balanced diet rich in vitamins; and adopt healthy lifestyle habits, avoiding late nights and excessive fatigue.
