She graduated from the Faculty of Pharmaceutical Sciences, Chulalongkorn University and is married to the physician Dr.Weng Tojirakarn, who shares her political activism.
[4] Both Thida and Weng then joined the illegal Communist Party of Thailand and fled to its camps in the jungle,[5] hiding there for more than six years.
[4] Once a critic of ousted prime minister Thaksin Shinawatra,[6] she joined the UDD, a political pressure group close to Thaksin, campaigning against the influence of the military and "royalist circles" following the 2006 coup d'état, against perceived injustice, and for a fundamental change of power structures in the Thai society.
After the fierce "Red Shirts" protests from March to May 2010, which ultimately led to the bloody military crackdowns in April and May and the arrests of the most important UDD leaders including her husband, Thida became chairwoman of the "United Front for Democracy Against Dictatorship" that December.
Thida is considered a moderate, generally rejecting violence in favour of political action.