Already as a 15 year old she was painting oil painting. She went to the Swedish art academy in the period 1873-1881. She shared the first price at the end of her education together with Richard Hall and therefore got the opportunity to seek a scholarship in Paris, where she was between 1882-1885.
She married Daniel Stoopendaal in 1887 and in 1893 they got the son Curt Nyström Stoopendaal.
Jenny Nyström is famous for her many postcards that started out with fairy tale motifs, which later became Christmas motifs, where her tomte / nisse ( Elf / dwarf ) became the standard image of Christmas elves in Sweden. She is often called the mother of the Swedish tomte. She began drawing her tomte around 1890.