What causes dark marks after shaving, and how can they be treated?

Generally speaking, "beard" refers to facial hair. Dark marks left after shaving may be related to factors such as thick beard growth, improper shaving techniques, inadequate skincare, hormonal imbalances, or inflammatory reactions. Treatments such as laser therapy, photorejuvenation, chemical peels (e.g., glycolic acid), and medication can be used under the guidance of a doctor. Specific analysis is as follows:

1. Thick Beard Growth

Individuals with dense and coarse facial hair are more prone to skin damage during shaving, leading to post-inflammatory hyperpigmentation. It is recommended to choose appropriate shaving methods and products to minimize skin injury. Under medical supervision, laser treatment can also be considered. This method uses laser energy to break down pigment particles and stimulate collagen production, effectively reducing dark marks. The typical cost for laser treatment ranges from 1,000 to 3,000 yuan per session. Noticeable improvement usually appears within 2–4 weeks, although side effects such as skin sensitivity or pain may occur.

2. Improper Shaving Technique

Using a dull razor, incorrect shaving angles, or applying excessive pressure can all cause skin trauma, resulting in residual hair roots and pigmentation. Before shaving, warm water should be used to soften the beard, and gentle motions are advised during shaving to avoid undue pressure. Photorejuvenation (intense pulsed light therapy) may also be performed under a doctor’s recommendation. This treatment uses broad-spectrum colored light to break down melanin in the skin, helping fade dark marks and improve skin texture. The average cost for photorejuvenation ranges from 2,000 to 4,000 yuan per session, with visible results typically appearing within 1–2 weeks. Possible side effects include redness and discomfort.

3. Inadequate Skincare

Failing to properly care for the skin after shaving—such as not cleaning the shaved area promptly or using irritating skincare products—may contribute to the formation of dark marks. After shaving, the area should be gently cleansed with lukewarm water, and overly oily or irritating products should be avoided. Chemical peels with high-concentration alpha-hydroxy acids (AHAs), such as glycolic acid, can be applied under medical advice to exfoliate dead skin cells and reduce pigmentation. The typical cost for glycolic acid peels ranges from 3,000 to 6,000 yuan per session, with improvements usually seen within 7–15 days. However, temporary side effects like skin sensitivity or redness may occur.

4. Hormonal Imbalance

Chronic sleep deprivation and emotional fluctuations may lead to hormonal imbalance. Abnormal hormone levels can affect both hair growth and skin condition, causing excessive beard growth and post-shaving pigmentation. Symptoms often include fatigue and irritability. Under medical supervision, medications such as Xiaoyao Pills, Wuji Baifeng Pills, or hydrocortisone tablets may be prescribed for treatment.

5. Inflammatory Reaction

Skin cuts from razors or allergic reactions to shaving creams can trigger inflammation. Inflammatory stimuli may lead to melanin deposition, resulting in dark marks. Accompanying symptoms may include pain or bleeding. Topical treatments such as tacrolimus ointment, erythromycin ointment, or mupirocin ointment can be used as directed by a physician.

In daily life, it's important to keep the skin clean and well-moisturized. Use mild facial cleansers and moisturizers to maintain healthy skin. When shaving, use gentle movements and avoid excessive force to prevent skin damage.