What causes scaly patches of dandruff on the scalp?
Apr 26, 2023
Source: Cainiu Health
Dr. Liu Wan
Introduction
Scalp flaking in patches may be caused by non-medical factors, but it could also be related to certain conditions such as seborrheic dermatitis, tinea capitis, pityriasis simplex of the scalp, or scalp psoriasis, all of which can cause the aforementioned symptoms. It is recommended not to scratch or irritate the area, as this may lead to skin damage. Instead, visit a dermatology department at a hospital for examination, obtain an accurate diagnosis, and follow medical advice for treatment.
Scalp flakes appearing in patches may result from non-medical factors, or could be related to certain medical conditions such as seborrheic dermatitis or tinea capitis. It is recommended to pay attention to daily scalp care and, when necessary, seek medical treatment under a doctor's guidance. Specific details are as follows:
I. Non-medical Factors
Failure to maintain proper scalp hygiene and infrequent hair washing can lead to the accumulation of dirt on the scalp, causing scalp flakes to harden and shed in pieces when scratched. It is advised to keep the scalp clean and healthy by using appropriate hair care products and avoiding scratching, which may cause skin damage.
II. Medical Conditions
1. Seborrheic Dermatitis
This condition commonly occurs in areas with high sebum production, such as the scalp, face, chest, and back. Main symptoms include erythematous rashes, flaking, and itching. Patchy scalp scales may appear in affected areas. Under medical guidance, treatments such as carbon dioxide lotion, ketoconazole cream, or desonide cream may be used to help relieve symptoms.
2. Tinea Capitis (Scalp Ringworm)
Caused by fungal infection with dermatophytes, tinea capitis is a common clinical skin condition. Main symptoms include hair loss accompanied by scaling, flaking, broken hairs, and itching. With doctor's supervision, topical antifungals such as ketoconazole cream or miconazole nitrate cream may be applied. In some cases, oral medications such as itraconazole capsules or terbinafine hydrochloride tablets may also be prescribed.
In addition, other conditions such as pityriasis simplex or scalp psoriasis may also cause similar symptoms. Avoid scratching or irritating the scalp to prevent skin injury. It is important to visit a dermatology clinic at a hospital for proper evaluation, receive an accurate diagnosis, and follow medical advice for treatment.
