What causes pimples on the head?

Generally, acne on the scalp may be caused by poor dietary habits, inadequate hygiene, excessive stress, folliculitis, or seborrheic dermatitis. If discomfort occurs, it is advisable to seek medical attention promptly. Detailed explanations are as follows:

1. Poor Dietary Habits

Frequent consumption of high-sugar and high-fat foods may stimulate excessive sebaceous gland secretion, triggering scalp acne. It is recommended to adjust the diet by increasing intake of vegetables and fruits, reducing oily and spicy foods, and maintaining a balanced diet.

2. Poor Hygiene Habits

Failure to regularly clean the hair can lead to accumulation of scalp oil, sweat, and dust, creating an environment conducive to bacterial growth and promoting acne development. It is important to maintain hair cleanliness by washing the hair every 2–3 days.

3. Excessive Stress

Under stress, the body produces increased levels of cortisol, which may stimulate sebaceous glands, leading to clogged hair follicles and inflammatory reactions that contribute to scalp acne. Maintaining regular sleep patterns and appropriately managing psychological stress is recommended.

4. Folliculitis

Folliculitis is usually caused by infection with Staphylococcus aureus. The inflammatory response may trigger acne-like lesions in scalp hair follicles, often accompanied by symptoms such as scalp itching, redness, and pustules. Treatment may include medications such as mupirocin ointment, clindamycin phosphate gel, or amoxicillin capsules, as directed by a physician.

5. Seborrheic Dermatitis

Long-term consumption of spicy, greasy, or irritating foods may lead to excessive scalp oil production and result in seborrheic dermatitis. Persistent inflammation can cause acne-like lesions on the scalp, typically accompanied by oily scalp, flaking, and itching. Treatments may include ketoconazole shampoo, clotrimazole cream, or econazole nitrate cream, used under a doctor’s guidance.

In daily life, it is important to choose mild hair care products suitable for one's scalp type, wash the hair regularly, and keep the scalp clean and refreshed.