Gingival Recession as a periodontal defect which is found in all human societies and among all ages has attracted the attention of many scholars and researchers. Gingival recession and the subsequent root denudation can cause problems such as: improper appearance, reduction of the ability of the patient in keeping the area clean and increase of inflammation, increase of caries risk, abrasion of root and increase in dental hypersensitivity. As full knowledge of every problem is necessary in order to face it, the present writing tries to study the prevalence and incidence, causes, prevention methods, problems resulting from continuation of the defect and classification of different types of recession and there by give a rather complete analysis of the gingival recession.