Will a urinary tract infection cause very swollen inguinal lymph nodes?

Usually not: Urinary tract infection usually does not cause inguinal lymphnode enlaregment, but infection in the genital area can.

Occasionally but: Other causes such as sexually transmitted infections would be a concern. Have this evaluated.

Look Elsewhere: The bladder is an internal organ. Infections of the bladder would not cause enlarged inguinal lymph nodes. However, if you are having pain in your lower abdomen or genitals, a skin infection anywhere externally would likely result in swollen inguinal nodes. Check yourself or see someone who can assess your symptoms and do a thorough evaluation.