From 1894 to 1897, Boyle worked as an assistant medical officer at Claybury Hospital, where she focused on neurological disorders, as well as the Canning Town Mission Hospital. During her time in the East End of London, she was shocked by the way patients had to deal with emotional stress. While there, she became the first psychiatrist to identify bacillary dysentery among mental health patients in the facility. Boyle later became the medical superintendent at Canning Town Mission Hospital in the East End of London. As a result of the first hand experience she gained in working with mentally ill women in poverty, she was inspired to start her own facility. In 1897, she moved to Hove, East Sussex, where she and Mabel Jones set up the Lewes Road Dispensary for Women and Children, a GP surgery in Roundhill Crescent. In doing so, Boyle became the first female general practitioner in Brighton and Hove. Jones mostly looked over Lewes Road Dispensary which allowed Boyle to move to Brighton to start another hospital. In 1905, Boyle set up the Lady Chichester Hospital in Brighton for women suffering with mental diseases. The hospital offered free or low cost care in a mostly women environment. This practice was made specifically for the treatment of early mental disorders which was the first facility ever created for that type of treatment. The practice later relocated to Hove, and was founded to counter the problem of mentally ill women being sent to asylums. The facility was the only one in Brighton to provide inpatient care. One of Boyle's patients in 1922 was the outsider artist Madge Gill, who she seems to have supported in her ambitions to display her works. Boyle worked at this facility for fifty years and remained an integral part of the practice through location changes and expansions. In 1910, she was the only woman to speak during a discussion organised by Farquhar Buzzard about anxiety, depression and cyclothymia. During the First World War, from 1914 to 1918, she worked in Serbia with the Royal Free Hospital Unit along with James Berry, and after the war, she was awarded the Queen Elisabeth Medal and the Order of St.Sava. Boyle joined the Royal Medico-Psychological Association in 1898. After being an active and integral member of the association for years, Boyle became its first female president. In 1955 the association held their spring meeting in Brighton, to commemorate 50 years of the Lady Chichester Hospital. She was also involved in the creation of the Guardianship Society, the Medical Women's Federation, the International Medical Women's Federation, The Child Guidance Council, and the National Association for Mental Health.
Death and legacy
In 1929, Boyle moved to Pyecombe, West Sussex and she died there in November 1957, one day after her 88th birthday.Helen Boyle#cite note-WOB-3|Helen Boyle#cite note-BM-5| She was pioneer in mental health care for women. In 2015, a blue plaque at Aldrington House was erected for her, and a Brighton & Hove bus has been named in her honour.