What causes itching inside a child's buttocks?

In general, itching inside a child's buttocks may be caused by factors such as sweat irritation, inadequate local hygiene, perianal eczema, pinworm infection, or candidiasis. If abnormalities occur, prompt medical attention is recommended. Specific analyses are as follows:

1. Sweat Irritation

Children are highly active and tend to sweat heavily. Sweat contains components such as salt and urea. When sweat fails to evaporate promptly, these substances can irritate the skin and cause itching. To prevent this, keep the skin clean and dry, change undergarments frequently, and choose breathable cotton clothing. After bathing, thoroughly dry the buttock area to avoid sweat residue.

2. Inadequate Local Hygiene

If the buttocks are not properly cleaned during daily care, bacteria and secretions in residual waste may irritate the skin, triggering an inflammatory response and resulting in itching. Improve local hygiene by regularly changing diapers or underwear, using mild cleansers for washing, and ensuring the area remains dry.

3. Perianal Eczema

Perianal eczema may be triggered by bacterial infections or irritation from urine and feces. Eczema damages the skin’s barrier function, making it more susceptible to external irritants, leading to inflammation and itching. Symptoms may include redness, swelling, oozing, and dryness. Under medical guidance, topical medications such as desonide cream, tacrolimus ointment, or hydrocortisone butyrate cream may be used. Additionally, maintain cleanliness and dryness of the affected area and minimize exposure to urine and feces.

4. Pinworm Infection (Enterobiasis)

Pinworms parasitize the human intestine. Female worms migrate to the perianal area at night to lay eggs; proteins in the eggshells and associated secretions irritate the skin, causing intense itching. This may be accompanied by worsening anal itching at night and disturbed sleep. Treatment may include medications such as levamisole hydrochloride granules or pyrantel pamoate tablets, as directed by a physician. Maintaining personal hygiene, frequent handwashing, and preventing reinfection are also essential.

5. Candidiasis

The buttocks area in children is prone to moisture and poor ventilation, creating favorable conditions for fungal growth. Candida species can proliferate on the skin surface, disrupting normal skin structure and causing inflammation and itching. Additional symptoms may include erythematous patches, scaling, and small vesicles. Antifungal treatments such as clotrimazole cream, ketoconazole cream, or itraconazole capsules may be used under medical supervision.

Parents should ensure daily cleaning for children, paying particular attention to detail areas such as the buttocks, between toes, and underarms, to maintain dry and hygienic skin conditions.