Brown patches on the arm, itchy
Jun 01, 2023
Source: Cainiu Health
Dr. Liu Wan
Introduction
Brown patches on the arms accompanied by itching may be caused by factors such as hyperpigmentation, pityriasis versicolor, or seborrheic keratosis, and treatment should be based on the specific underlying cause. Pityriasis versicolor is usually due to Malassezia infection, and as the condition progresses, it can lead to brown patches on the skin. Treatment options include taking isotretinoin soft capsules orally or applying ketoconazole cream topically.
Brown patches on the arms accompanied by itching may be caused by factors such as hyperpigmentation, pityriasis versicolor, or seborrheic keratosis. Treatment should be based on the specific underlying cause. Details are as follows:
1. Hyperpigmentation
This may result from ultraviolet radiation exposure, dermatitis, or other causes. It primarily affects the face and may lead to the development of pigmented spots. Under medical guidance, topical medications such as hydroquinone cream, tretinoin cream, or asiaticoside ointment may be used for treatment.
2. Pityriasis Versicolor
This is usually caused by infection with Malassezia fungi, leading to the appearance of small spotted patches on the skin. As the condition progresses, brown patches may develop. Treatment may include oral isotretinoin soft capsules or topical application of ketoconazole cream, following a doctor's instructions.
3. Seborrheic Keratosis
This typically results from proliferation of epidermal keratinocytes, causing benign epidermal growths. It is commonly seen in older adults and may present as brown spots. Under medical supervision, treatments may include topical use of hydrocortisone butyrate cream or triamcinolone acetonide/econazole cream.
In addition to the above causes, similar symptoms may also result from eczema, flat warts, cirrhosis, or other conditions. It is important to take proper sun protection measures, such as applying sunscreen when going outdoors.
