DDDDDDDDDDDDD Effective management logically follows accurate diagsis. Such logic often is difficult to apply in practice. Absolute diagstic accuracy may t be possible, particularly in the field of primary care, when management has to be on analysis of symptoms and on kwledge of the individual patient and family. This series follows that on Problems in Practice which was concerned more with diagsis in the widest sense and this series deals more definitively with general care and specific treatment of symptoms and diseases. Good management must include kwledge of the nature, course and outcome of the conditions, as well as prominent clinical features and assess- is on what to do best for the ment and investigations, but the emphasis patient. Family medical practitioners have particular difficulties and advantages in their work. Because they often work in professional isolation in the com- munity and deal with relatively small numbers of near-rmal patients their experience with the more serious and more rare conditions is restricted. They find it difficult to remain up-to-date with medical advances and even more difficult to decide on the suitability and application of new and rela- tively untried methods compared with those that are 'old' and well proven. Their advantages are that because of long-term continuous care for their patients they have come to kw them and their families well and are able to become familiar with the more common and less serious diseases of their communities.