Erik Tryggelin studied at the Royal Swedish Academy of Arts (Konstakademien) in Stockholm.
Among others Josse and Gaston exhibited and moreover Pierre Bonnard, Édouard Vuillard, Paul Cézanne, Georges Seurat, Kees van Dongen, Henri Matisse, Henri Rousseau (he was also known as Le Douanier, the customs officer), Raoul Dufy, Maurice de Vlaminck, Amedeo Modigliani and Maurice Utrillo exhibited.
Erik Tryggelin also visited Gertrude Stein’s collection with works by Picasso and Matisse.
In Paris Erik Tryggelin also met Karl Isakson and John Sten, and he was surprised by their positive attitude.
Tryggelin mainly performed figurative compositions and cityscapes, often with fine evening mood, and with motifs often from Stockholm, Visby and Vadstena.