Phon Sangsingkeo

At an annual meeting of the World Federation for Mental Health in 1962, he talked about the problems posed by social and cultural changes to mental health today and is quoted to have remarked that:

In 1942, he succeeded Dr. Luang to become the director of the Mental Hospital (Rong Phayaban Khon Sia Sati in Thai) in Thonburi. At the same time, he was appointed director of a new division in the Department of Health responsible for mental institutions, a position he would hold until 1954. When the war ended, he helped build parks within facilities and gave "happy names" to buildings. This practice of providing green spaces for patients still continue until the present day. Instead of using the donations to renovate the old director's house where he lived, he focused on upgrading facilities for the benefit of patients and hospital staff. He also became instrumental in sending young doctors and nurses abroad to study, with the hope that they will continue his work in the future.

He married Pravas Rasanonda in 1935, the same year he became assistant director to Dr. Luang. The marriage brought forth three sons.

Phon joined the Department of Health in 1929. From 1930 to 1934, he was provincial medical officer at Sakolnakorn where he developed in interest in providing comfort and easing the miseries of the mentally ill. In 1935, he became assistant director of the mental hospital in Thonburi under Dr. Luang Vichien Patayakorn who sent the young man to study and observe medical practices in Japan, the Philippines, and Indonesia. At that time, straitjackets were used to subdue mental patients but Phon and his colleagues pushed for reforms, banking instead on gentleness and love.

Phon Sangsingkeo (or Fon Saengsingkaew, Thai: ฝน แสงสิงแก้ว) (April 24, 1907–1980) is a Thai medical doctor whose studies on factors that contribute to the mental well-being of a person earned him the Ramon Magsaysay Award for Government Service in 1966. His holistic approach led him to integrate how the rapid advancement of technology and cultural changes affect mental health, resulting in a more humane treatment of mental patients thus putting the dictum "treat the person as a person" in practice. For this, he is known as the father of modern psychiatry in Thailand.