Aggressive periodontitis is a low-prevalence, multifactorial disease, of rapid progression and with no systemic compromise. It presents immunological alterations, a strong genetic influence, familial aggregation and early onset. It can be localized or generalized. It is not clear whether it is an independent periodontal disease, or if it is the phenotypic expression of chronic periodontitis in susceptible patients. Its diagnostic protocol includes a dental medical history, a clinical periodontal examination and a radiological examination. Treatment usually includes improving oral hygiene, dental scaling and root planing, as well as systemic and local antibiotic therapy. Surgical therapy will depend on each individual case. Maintenance therapy is essential to achieve better results. The aim of this paper is to review diagnostic and therapeutic protocols, and to propose a treatment flowchart based on the latest scientific evidence.