Bacteria is the main cause of abscess’, although there are other potential causes such as parasites, fungal infections, and even foreign objects lodged in the body. Fast Aid Urgent Care can provide a diagnosis based on physical symptoms and lab tests to determine the cause of your abscess.   Bacteria, fungus or foreign objects can enter the body through an open wound like cuts, bites, scrapes or skin irritation and cause infection. The bacteria or fungus then multiplies, creating a pocket of pus that collects in the affected area, leading to an abscess. Fast Aid Urgent Care can provide testing to determine if you have an abscess caused by bacteria.