Final answer:
A bladder infection, or cystitis, is a common type of urinary tract infection caused by bacteria. Symptoms include pain with urination and frequent urination. Treatment usually involves antibiotics.
Step-by-step explanation:
A bladder infection, also known as cystitis, is a common type of urinary tract infection. It occurs when the urinary bladder becomes infected by bacteria, typically Escherichia coli. Symptoms of bladder infections include pain with urination, frequent urination, and feeling the need to urinate despite having an empty bladder. Bladder infections are typically treated with antibiotics.