She has represented Sweden in over 100 international matches, including the Winter Olympic Games in the 2014 and 2018 as well as at three IIHF Women's World Championships.

She spent a season and a half playing in Örebro when she was 14 before joining Linköping HC Dam when Riksserien was created as the top flight of women's hockey in Sweden in 2007.

Her point total barely dropped in 2016–17, down to 39, as she scored a career-best 20 goals, leading HV71 to the SDHL championship finals, where they lost to Djurgårdens IF.

Her first contract outside of Sweden was signed in July 2023 with HC Ambrì-Piotta Girls in the Swiss Women's League.

Rask was selected to the roster of the Swedish national team playing in the women's ice hockey tournament at the 2014 Winter Olympics.

She took part in the 2019 players' strike of the national team, demanding better conditions and investment from the Swedish Ice Hockey Federation.

"[13][14] Following her return from retirement in 2022, she rejoined the national team and appeared in all three tournaments of the 2022–23 Women's Euro Hockey Tour.

Her younger brother, Victor Rask, was selected in the second round (42nd overall) of the 2011 NHL Entry Draft by the Carolina Hurricanes and currently plays in the Swiss National League with SC Rapperswil-Jona Lakers.

In 2017, Rask was able to become a professional athlete through grants from the Swedish Olympic Committee in combination with her SDHL salary and some financial support from her brother, Victor.