Effect of sun exposure on melasma severity: Before versus after COVID-19 pandemic city lockdown in a tropical country

A cross sectional study on factors affecting melasma before and during COVID-19 situation in Thai patients.

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20210727003

Enrollment

119

Registered

2021-07-27

Start date

2021-03-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Melasma patients and behavioral alteration influenced melasma from before and in-between lockdown period. Melasma Behavioral alteration influenced mealsma lockdown period Change in melasma severity

Interventions

Patients diagnosed with melasma by dermatologist.

Prevention

Melasma

Eligibility

Sex/Gender

All

Age

18 Years to 75 Years

Inclusion criteria

Inclusion criteria: 1. Diagnosed with melasma by dermatologist 2. Older than 18 years old

Exclusion criteria

Exclusion criteria: 1. Patient who cannot come to follow up visit as protocol.

Design outcomes

Primary

Measure	Time frame
Physician assesment of melasma severity at Baseline and 2 months in-between lockdon period modified Melasma Area Severity Index,Patient self assesment of melasma severity at Baseline and 2 months in-between lockdon period 4 levels grading scale (mild, moderate, severe, most severe)	—

Secondary

Measure	Time frame
Demographic data at baseline Questionnaire,Dermatology life quality index at Baseline and 2 months in-between lockdon period DLQI	—

Countries

Thailand

Contacts

Public ContactThanya Techapichetvanich

Faculty of Medicine Siriraj Hospital, Mahidol University

thanya.tec@gmail.com0837122248

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026