1. Furunculosis is an infection of the hair follicle in the outer ear that causes pain spreading to the jaw or neck and swelling around the ear. 2. Otitis externa is a generalized infection of the external ear canal caused by irritants like dust or humidity. Symptoms include a painfully inflamed and weeping canal. 3. Wax in the ear can build up and cause hearing loss. It is normally extruded by chewing but may require gentle removal by curette or syringing if excessive.

6. OTITIS EXTERNA

10. Pathways of infection Throw the Eustachian tube

11. Pathways of infection Infection may be diffuse (influenza, measles, scarlett fever) From ear channel ( only in case of pre-existing eardrum perforation ) Measles

13. The 1-st step is the closing of the Eustachian tube The pressure inside is negative exudates The pressure inside is positive Symptoms: Pain Rise in temperature The eardrum becomes red and bulge and finally - perforated

17. The period before perforation

19. The period of purulent discharge

26. Myringotomy (tympanotomy)

27. Tympanotomy

28. Tympanotomy

29. Tympanostomy