52%. Source: The Rochester, WA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.
A pilonidal cyst is a fluid-filled sac that occurs in the area at the top of the crease of the buttocks overlying the tailbone (sacrum). This cyst and the overlying skin in the area can become infected, forming a painful abscess. Pilonidal cysts are fluid-filled sacs that form at the top of the crease of the buttocks above the sacrum. 2  A painful abscess can form if the cyst and the overlying skin become infected.
Trauma or injury to the area may cause the cyst to become tender and painful, to form an abscess, and possibly to drain. Trauma increases the risk of bacterial infection in a pilonidal sinus. Treatment is straightforward, beginning with antibiotics if the area is infected, followed by surgical removal.he most common location for a pilonidal cyst is the skin in the area of the tailbone. The cysts often occur in women between puberty and age 40. People who are obese or those with thick body hair have an increased risk of pilonidal cysts.