During World War I he worked as a medical minder with the Royal Army Medical Corps. After working with the renowned French oral and maxillofacial surgeon Hippolyte Morestin on skin graft, he persuaded the army's chief surgeon, Arbuthnot-Lane, to establish a facial injury ward at the Cambridge Military Hospital, Aldershot, later upgraded to a new hospital for facial repairs at Sidcup in 1917. There Gillies and his colleagues developed many techniques of plastic surgery; more than 11,000 operations were performed on more than 5,000 men (mostly soldiers with facial injuries, usually from gunshot wounds).After the war, Gillies developed a private practice with Rainsford Mowlem, including many famous patients, and travelled extensively to promote his advanced techniques worldwide.
The Romans also performed plastic cosmetic surgery. The Romans were able to perform simple techniques, such as repairing damaged ears, from around the 1st century BC. For religious reasons, they did not dissect either human beings or animals, thus their knowledge was based in its entirety on the texts of their Greek predecessors. Notwithstanding, Aulus Cornelius Celsus left some surprisingly accurate anatomical descriptions, some of which — for instance, his studies on the genitalia and the skeleton — are of special interest to plastic surgery.
Deep chemical peels involve a longer procedure and longer recovery time that lasts up to several months in some cases. Patients who want to correct blotches caused by sun exposure or age, minimize coarse wrinkles, or remove a pre-cancerous growth may benefit from a deep peel. There are certain factors which must be taken into consideration when contemplating a deep chemical peel. Darker-skinned patients and individuals with heart problems are not ideal candidates. Potential chemical peel candidates should be aware that the treatment may take an hour or more, and may require sedation. Anyone who decides on this procedure should be prepared for a long, slow recovery period, and should wear sunscreen whenever exposed to sun.