She started studying dance at the Young Place Dance School in London at the age of 17. She completed her studies at London Contemporary Dance School with a BA (hons) and then worked as a dancer with Dance TheaterRed - Andy Pappas, Yael Flexer Dance Co. and Lyrical DanceTheatre. She worked as a dance teacher at Middlesex University and for 5 years at Young Place. In 1996 she returned to Greece where she worked with the dance companies Eros Angelos by Petros Gallias, AKIN by Marina Mavrogenis and X-Art by Katerina Andriopoulou. In 2001 she participated as assistant choreographer and dancer in the theatre performance "Penthesilea", directed by Peter Stein. She has also taught for 5 years at Katerina Rodiou's dance school.
Since 2002 she has been running the Dance Cultural Centre dance studio (www.dancce.gr) together with Dimitris Nasiakos. In 2008 they started the company DAN.C.CE UNITIVA (https://dancceunitiva.gr) and organized the International Dance Festival ARC for DANCE FESTIVAL (https://arcfordancefestival.gr), the first platform for contemporary dance with works by emerging Greek and foreign artists to date. In 2019 they organized the 1st contemporary dance festival for young audiences MOVING COLORS (https://movingcolorsfest.com). The 2nd one followed in December 2021.
Frosso Trousa has been a member of the European network Spider Expand!, a two-year program of artistic exchange and presentation among the countries: Belgium, Slovenia, France, Croatia, and Greece. She was responsible for the dance sector in the core group of IETM International Performing Arts Network event that was held in Athens in 2013. Since 2014 she is a member of the European dance network, AEROWAVES- Dance Across Europe.
She has been a member of the working group 'Open Doors’, a collaboration between the Ministry of Culture and the Athens Concert Hal,l for supporting young artists during their preparation period and the presentation of their work to the public. She was a member of the Dance Grants Committee of the Ministry of Culture for 2017-2021.
In April 2022 DAN.C.CE UNITIVA was the organizer, in collaboration with Eleusis 2023 - European Capital of Culture, for the 10th Spring Forward Festival, the annual festival of the AEROWAVES network.