Otitis externa:Infectionof theskincovering theouter earcanal that leadsinto theear drum, usually due tobacteriasuch asstreptococcus, staphylococcus, or pseudomonas. Swimmer's ear is usually caused by excessivewaterexposure. Infection with afungusmay also occur. When water pools in theearcanal (frequently trapped by wax), the skin will become soggy and serve as an invitingculturemedia for bacteria.
The firstsignof耳炎externa is that the ear feels full and may itch. Next the ear canal swells, ear drainage follows, and the ear is very painful, especially with movement of the outside portion of the ear. The ear canal can swell shut and the side of the face become swollen. The glands of theneckmay enlarge, and it can become more difficult to open thejaw.
Moisture and irritation will prolong the course of otitis externa. For this reason, the ear should be kept dry. While showering or swimming, use an ear plug (one that is designed to keep water out), or use cotton with Vaseline on the outside. Scratching the inside of the ear or using Q-tips should be avoided. A hearing aid should be left out as much as possible until swelling anddischargestops. The most common treatment consists ofantibioticear drops with or without anoralantibiotic.Antifungal下降也可能是必需的fungalinfection. A "wick" may need to be placed in the ear canal to stent it open and serve as a conduit for the ear drops. Suctioning the ear canal also helps.
