Lowenfeld followed her sister into the London Royal Free Hospital School of Medicine for Women in Bloomsbury, London. By the outbreak of the First World War, she had passed the minimum requirement to practice medicine, In 1914 she got a job at the Royal Free Hospital followed by a short period at the Hospital for Sick Children, Great Ormond Street.
Lowenfeld pursued her education at the London Royal Free Hospital School of Medicine for Women in Bloomsbury, London. By the time World War I broke out, she had fulfilled the necessary requirements to become a medical practitioner, In 1914 she landed a job at the Royal Free Hospital and later worked briefly at the Hospital for Sick Children, Great Ormond Street.