This document discusses acute tonsillitis, including the histology and classification of tonsils, the different types of acute tonsillitis, their symptoms, signs, etiology, treatment and potential complications. The main types discussed are acute catarrhal/superficial tonsillitis, acute membranous tonsillitis, acute follicular tonsillitis and acute parenchymatous tonsillitis. The etiology is primarily bacterial or viral infection, with common bacteria being Hemolytic Streptococcus, Staphylococcus and Pneumococcus. Symptoms include sore throat, difficulty swallowing, fever and constitutional symptoms like headache and malaise. Treatment involves rest, fluids, analgesics and antibiotics like penicillin for 7-