Summer Sleeve Season Arrives! Arm & Decollete Skin Concerns Survey | 78.3% of 20-50s Concerned About "Upper Arm Bumps" Revealed

[Conclusion] Key Points of This Survey

To conclude, the most concerning skin problem during the short-sleeve season is "upper arm bumps (Keratosis Pilaris)," with 78.3% of the total respondents being troubled by it. The true nature of upper arm bumps is a skin condition called Keratosis Pilaris, which occurs when keratin blocks hair follicles. While self-care often finds it difficult to improve, improvement can be expected through dermatological topical treatments, chemical peels, and laser treatments.

- 78.3% cited "upper arm bumps (Keratosis Pilaris)" as their No. 1 skin concern for the short-sleeve season. - 65.7% were unaware that "insufficient washing or moisturizing" was a cause of persistent decollete acne. - Regarding arm spots and freckles, 91.0% responded that they "want to take some measures," but 82.3% did not know appropriate care methods.

Glossary

### What is Keratosis Pilaris? Keratosis Pilaris is a skin condition in which small, rough papules appear on the skin surface due to keratin clogging hair follicles. It frequently occurs on the outer sides of the upper arms and thighs, and on the cheeks, and is often recognized as "chicken skin-like bumps." Genetic factors are involved, and it tends to worsen during puberty but often improves with age.

### What is Chemical Peeling? Chemical peeling is a treatment method that involves applying an acidic agent to the skin to chemically remove old keratin and clogged pores. Glycolic acid and salicylic acid are commonly used, and it is employed in the treatment of Keratosis Pilaris, acne, and spots.

### What is Phototherapy (IPL)? Phototherapy (IPL) is a treatment method that involves irradiating light containing multiple wavelengths to damage and remove melanin pigment, which causes spots and freckles. It is characterized by a milder action than lasers and a shorter downtime.

Arm & Decollete Skin Concerns | Treatment Comparison

| Comparison Item | Keratosis Pilaris (Upper Arm Bumps) | Decollete Acne | Arm Spots/Freckles | | :-------------------------- | :---------------------------------- | :------------------------------- | :------------------------------- | | **Main Cause** | Keratin clogging pores, genetics | Sebum secretion, leftover wash, friction | UV radiation, aging | | **Self-care Effectiveness** | Limited (moisturizing, exfoliation) | Moderate (improved cleansing, moisturizing) | Limited (sunscreen prevention only) | | **Dermatological Treatment** | Topical medication, peeling, laser | Topical medication, peeling, oral medication | Phototherapy, laser, topical medication | | **Estimated Treatment Period** | 3-6 months | 1-3 months | 2-6 months | | **Estimated Cost (per session)** | 5,000-15,000 yen | 3,000-10,000 yen | 10,000-30,000 yen | | **Expected Improvement Rate** | 70-90% | 80-95% | 60-80% | *This is a general guideline and varies by individual.

I-Clinic (Shinjuku, Shibuya, Ueno, Ikebukuro, Tokyo, Omiya branches), operated by Medical Corporation Tetsu-Yu-Kai, conducted a survey on "Arm and Decollete Skin Concerns" targeting 300 men and women aged 20-50 nationwide, coinciding with the arrival of the short-sleeve season. Our clinic specializes in skin tumors and dermatological surgery, offering mainly day-surgery-focused dermatological care.

Survey Background

With rising temperatures and increased opportunities to wear short sleeves and sleeveless attire from May onwards, consultations regarding arm and decollete skin concerns rapidly increase. In particular, we frequently receive comments such as "I'm concerned about bumps on my upper arms," "My decollete acne won't heal," and "Arm spots are noticeable." This survey was conducted to grasp the actual state of such skin troubles and the awareness of appropriate care methods.

Survey Overview

Target respondents: Men and women aged 20-50 nationwide who have arm or decollete skin concerns. Survey period: April 20, 2026 - April 29, 2026 Survey method: Internet survey Number of respondents: 300

Survey Results

### 78.3% responded that "upper arm bumps" are their most concerning skin problem.

Question: What is your most concerning arm/decollete skin problem during the short-sleeve season?

Keratosis Pilaris overwhelmingly accounted for skin concerns during the short-sleeve season. It suggests that such concerns significantly impact daily life, with comments like "The rough texture is embarrassing" and "I hesitate to wear sleeveless clothes."

### 67.3% responded that they "did not know" the disease name Keratosis Pilaris.

Question: Did you know the true nature of upper arm bumps (Keratosis Pilaris)?

It was found that about 70% of respondents did not even recognize the disease name Keratosis Pilaris, and many misunderstood it as "just my constitution" or "something that will heal naturally." There is a need to raise awareness that improvement can be expected with dermatological treatment.

### 65.7% responded "stress and hormonal balance" and were unaware of the impact of leftover wash and friction.

Question: What do you recognize as the cause of recurring decollete acne? (Multiple answers allowed, choose the most applicable one)

While many respondents cited "stress" as the cause of decollete acne, it was revealed that many were unaware of physical factors such as leftover wash and friction from clothing.