There are red spots on the inner sides of the arms and thighs.

Red spots on the inner sides of the arms and thighs may result from non-pathological factors such as insect bites, or pathological causes such as allergies and dermatitis. These conditions can be managed through protective measures and medication.

I. Non-disease Factors

During summer, increased insect activity may lead to bites from mosquitoes, ants, or other insects. This can damage superficial skin cells, resulting in red spots on the inner arms and thighs. These spots are usually small and do not require extensive medical treatment; they typically fade naturally over time. Preventive measures should be taken to avoid further bites.

II. Disease Factors

1. Allergy

Due to individual body constitution, when the skin comes into contact with allergens such as pollen or dust, an immune response may be triggered. Immune cells may attack healthy skin cells, causing cell damage and leading to red spots, itching, and redness on the inner arms and thighs. If itching occurs, medications such as loratadine tablets, chlorpheniramine maleate tablets, or terfenadine tablets may be used under medical guidance. Additionally, it is important to avoid known allergens.

2. Dermatitis

Dermatitis may occur due to inadequate skin cleaning, close contact with animals, or excessive sebum production, which can lead to bacterial or microbial infections and clogged pores. Symptoms include red spots, stinging, and itching on the inner arms and thighs. Treatment may involve topical use of calamine lotion, halometasone cream, or boric acid solution as directed by a physician. Maintaining proper skin hygiene is essential. If skin discomfort persists, prompt medical evaluation at a hospital is recommended, including tests such as complete blood count and microscopic smear examination, to establish a clear diagnosis and receive targeted treatment.

3. Keratosis Pilaris

Red spots on the inner arms and thighs may also indicate keratosis pilaris, a chronic follicular keratinization disorder. This condition is characterized by visible keratin plugs or keratotic papules at the openings of hair follicles. Symptoms can be improved with topical retinoid creams. Regular exfoliation is recommended, and scratching should be avoided to prevent infection.