Redness at the back of the head, no pain or itching, what could be the cause?

In general, redness on the back of the head without pain or itching may be caused by conditions such as skin allergy, seborrheic dermatitis of the scalp, or scalp dermatitis. Different causes require different treatments. Specific analyses are as follows:

1. Skin Allergy

Skin allergies may also cause redness of the scalp, usually accompanied by symptoms such as itching and stinging. Topical application of medications like fluorocinolone acetonide and borneol ointment or acyclovir ointment—under medical guidance—can be effective. Oral medications such as Xiaofeng Zhiyang Granules or loratadine tablets may also be used for treatment.

2. Seborrheic Dermatitis of the Scalp

Seborrheic dermatitis of the scalp is a scalp condition caused by excessive sebum secretion, often accompanied by symptoms including redness, oiliness, and itching of the scalp. Treatment may include oral administration of metronidazole vitamin B6 tablets or loratadine tablets under a doctor's guidance.

3. Scalp Dermatitis

Scalp dermatitis is a common scalp condition typically associated with redness, itching, and flaking. It is recommended to visit a nearby hospital for evaluation, complete necessary auxiliary examinations, confirm the diagnosis, and receive timely targeted treatment.

Besides the above, redness may also be caused by psoriasis. If scalp redness is accompanied by other symptoms such as itching, flaking, or oiliness, prompt medical consultation is advised to determine the underlying cause and receive proper treatment.