Final answer:
Cystitis is the inflammation of the bladder, typically caused by a bacterial infection and associated with urinary tract infections.
Step-by-step explanation:
Cystitis is inflammation of the bladder most often caused by a bacterial infection. This condition can result in discomfort, pain, and the frequent need to urinate. Cystitis does not encompass inflammation of the ureters; it is primarily limited to the bladder, though the urethra may sometimes be involved. Also, it is not an inflammation of the kidneys, which is known as pyelonephritis. While cystitis can be due to other causes, including certain drugs, radiation therapy, and potential irritants, the most common type is bacterial, known as a urinary tract infection (UTI).