The dark spot on the scalp is getting larger, without pain or itching.

The dark spot on the scalp is gradually increasing in size without pain or itching, which may be caused by skin pigmentation, pigmented nevus, sebaceous nevus, or other reasons. Targeted treatment should be provided according to the specific cause. Detailed analysis is as follows:

1. Skin Pigmentation

Prolonged exposure of the scalp to sunlight and ultraviolet radiation may lead to skin pigmentation, presenting as dark spots. Generally, there are no symptoms such as pain or itching. If not promptly addressed, the dark spot may continue to enlarge. Topical medications such as hydroquinone cream or tretinoin ointment may be used under medical guidance to alleviate the condition.

2. Pigmented Nevus

A pigmented nevus is a benign tumor arising from melanocytes, appearing as a localized black patch, usually without noticeable symptoms like itching or pain. If the nevus suddenly grows larger or darker, it may indicate malignant transformation. In such cases, surgical excision should be performed promptly.

3. Sebaceous Nevus

Sebaceous nevus is a hamartoma composed of sebaceous glands. Initially, it appears as a hairless patch on the skin surface. Over time, the lesion gradually enlarges and develops papillary projections. It typically does not cause itching or pain. Treatment options include laser therapy.

In addition to the above relatively common causes, other conditions such as seborrheic keratosis, common warts, or malignant transformation of melanocytic nevi may also be responsible. If any discomfort or unusual symptoms occur, prompt medical evaluation and timely treatment are essential to avoid disease progression.