Arnica is the routine pre-operative treatment for children undergoing operation. Children having tonsils and adenoids removed are given Arnica 30, 4-hourly, and post-operatively Rhus tox 30, 4-hourly, or as required. Staphysagria is valuable when the operation wound is painful. Pain in a cut wound is a strong indication for Staphysagria. Silica is useful when wounds continue to discharge, especially when the pus is thin and serous. Pyrogen may be invaluable in any condition in which there is a septic focus and toxaemia or septicaemia, whether after tooth extraction, in peritonitis, skin or urinary infection. Toxaemia plus a discrepancy between pulse and temperature is a very reliable guide to Pyrogen. Other symptoms may be present, such as restlessness, because the part lain on feels sore (“the bed feels hard”) or offensive odours. An alternative to Pyrogen which appears to act very well in osteomyelitis or any condition in which there is a profuse discharge from a wound, is to take a bead of pus and place it in distilled water or alcohol and have it potentized to the 30th potency. It is then given in the same way as any other remedy, say t.d.s. for 3 days, followed by b.d. for 3 days. In some recent cases of osteomyelitis and otorrhoea with “threatened mastoid”, this treatment appeared to be extremely helpful in addition to chemotherapy. The use of vaccines for such conditions is, of course, well known, a method which has perhaps been to some extent neglected since the advent of chemotherapy. Dr. Charles Wheeler believed that the indication for an autogenous potency was a profuse discharge. The powerful effects of Homoeopathy in severely toxic states is surprising. I have seen cases in which white blood count was up as high as 50,000 even in older children, respond rapidly to Pyrogen alone. These are but a few of the ways in which Homoeopathy can be of use in surgical cases.