Over 5,000 inmates in 143 prisons across the country are suffering psychological problems, the Corrections Department has reported.
Worada Wasunnantasiri, director of the department's Medical Division, said the figure made up 2% of the 260,000 inmates in the nation's prison system.
Disorders such as anxiety and depression tended to affect those inmates jailed for drug-related crimes and had taken drugs that had affected their minds, Ms Worada said.
