Pimsiri Poolsuwan, M.D.
Academic Dermatology | Photodermatology | Photomedicine & Laser | Hair & Scalp | Pigmentary Disorders
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Dr. Pimsiri Poolsuwan is a dermatologist with an academic and teaching role at the Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Thailand. Her academic background combines clinical dermatology with advanced international training in photobiology, photomedicine, phototherapy, and laser dermatology.
She graduated with a Doctor of Medicine, First-Class Honors, from the Faculty of Medicine, Thammasat University, completed dermatology residency training at the Institute of Dermatology, Thailand, and subsequently pursued an Honorary Clinical Fellowship in Photobiology at St John’s Institute of Dermatology, Guy’s and St Thomas’ Hospital, London, followed by a Clinical Fellowship in Photomedicine and Laser at the University of British Columbia, Vancouver, Canada.
Her clinical approach emphasizes systematic dermatologic diagnosis and evidence-based selection of medical treatment, phototherapy, laser, and energy-based technologies according to disease mechanisms and appropriate clinical indications.
Areas of Expertise & Clinical Interests
• Photodermatology
• Photomedicine & Phototherapy
• Laser Dermatology
• Pigmentary Disorders
• Vitiligo
• Psoriasis
• Hair & Scalp Disorders
• Hair Loss & Hair Thinning
• Inflammatory Scalp Disorders
• General & Complex Dermatology
Hair & Scalp
For patients presenting with hair loss, hair thinning, or scalp disorders, Dr. Poolsuwan’s background in clinical dermatology supports a systematic evaluation of scalp disease, inflammation, dermatologic conditions, and immune-mediated processes that may affect the hair follicle and hair-growth cycle.
Her 2025 academic work also provides a direct connection with hair and scalp dermatology. A case report co-authored by Dr. Poolsuwan described lupus profundus associated with non-scarring alopecia involving the frontal and temporal scalp, illustrating the importance of identifying underlying inflammatory and autoimmune skin disease in patients presenting with hair loss.
Education & Advanced Training
• 2024–2025 — Clinical Fellowship in Photomedicine and Laser, University of British Columbia, Vancouver, British Columbia, Canada
• 2023 — Honorary Clinical Fellowship in Photobiology, St John’s Institute of Dermatology, Guy’s and St Thomas’ Hospital, London, United Kingdom
• 2016–2020 — Dermatology Residency Training, Institute of Dermatology, Thailand
• 2007–2013 — Doctor of Medicine (M.D.), First-Class Honors, Faculty of Medicine, Thammasat University
Academic & Clinical Experience
• 2018–Present — Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Thailand — Clinical dermatology practice with an academic and teaching role
• 2016–2020 — Dermatology Residency Training, Institute of Dermatology, Thailand
• 2013–2016 — Internship, Department of Medicine, Queen Savang Vadhana Memorial Hospital
Research & Academic Publications
1. Palisaded Neutrophilic and Granulomatous Dermatitis Associated with Lupus Profundus: A Case Report and Literature Review
Suwanchote S, Poolsuwan P. Thai Journal of Dermatology. 2025;41(3):77–82.
This report describes lupus profundus associated with non-scarring alopecia involving the frontal and temporal scalp, providing a direct academic connection with hair and scalp dermatology.
2. The Comparison of Vitamin D Levels in Thai Adults Between Patients with Vitiligo and the Healthy Controlled Groups
Thea S, Khommee J, Kammuengkiattiwong P, Poolsuwan P. RSU International Research Conference 2024 on Science and Technology.
A verified conference proceeding in which Dr. Poolsuwan is a co-author.
3. Interesting Presentation of Cutaneous Tuberculosis on the Face: A Case Report
Ovattrakul A, Poolsuwan P. Royal Thai Army Medical Journal. 2022;75(2):127–133.
A clinical case report highlighting differential diagnosis and clinicopathologic evaluation of cutaneous tuberculosis.
4. Comparative Efficacy Between Localized 308-nm Excimer Light and Targeted 311-nm Narrowband Ultraviolet B Phototherapy in Vitiligo: A Randomized, Single-Blind Comparison Study
Poolsuwan P, Churee C, Pattamadilok B. Photodermatology, Photoimmunology & Photomedicine. 2021;37(2):123–130. DOI: 10.1111/phpp.12619 | PMID: 33047405
A randomized controlled trial comparing localized 308-nm excimer light with targeted 311-nm narrowband UVB phototherapy in vitiligo.
5. Oral Sarcoidosis with Pulmonary Involvement: A Case Report with Literature Review
Poolsuwan P, Jiraratwattana S, Sudtikoonaseth P, Puangpet P. Royal Thai Army Medical Journal. 2018;71:291–296.
A case report demonstrating the assessment of mucocutaneous manifestations associated with systemic sarcoidosis.
International Academic Presentations & Awards
• 2025 — Minimal Erythema Dose (MED) Assessment by a Novel Mini-Phototesting Method — 34th Annual Meeting of the Photodermatology Society, Orlando, Florida — 1st Place, Trainee Abstract Competition
• 2022 — Comparison of the Efficacy Between Monochromatic Excimer Light 308 nm and Localized Narrow-Band Ultraviolet B 311 nm Phototherapy in Vitiligo — 12th Asian Dermatological Congress, Japan
Clinic Schedule at Piyawat Clinic
Saturday, 10:00 AM–5:00 PM
Please contact the clinic in advance to confirm the physician’s schedule and arrange an appointment.