Hello I was told by my husband he has a severe pain in his lower left back side. it came on suddenly around 10:am this morning and has since gotten worse. He says when the pain subsided, it would come back worse. He is walking cautiously. He is 58 years of age also has a back injury. He says this is totally a new pain. He also says his urine is cloudy and strong smelling. Should he seek medical attention immediately ?