In 1851 he returned to medicine, and several years later sold the Landes-Industrie-Comptoir to Ludwig Denicke from LĂĽneburg.Froriep is largely known for popularizing non-German illustrated works, making them known to German scientists and physicians.
He published Abbildungen der Hautkrankheiten, a translation of Thomas Bateman's "Delineations of Cutaneous Disease".
He characterized the condition as muskelschwiele (muscle callus) and reported his findings in a paper titled "Ein beitrag zur pathologie und therapie des rheumatismus".