I'm having urinary infection pus cell 15 to 20. how bad is this?

Systemic symptoms?: The # of white cells in the urine does'mt tell severity. The most important thing is whether or not the infection has passed from a urethritis (end of the urinary tract), a cystitis (bladder infection), a pyelonephritis (kidney infection) especially if the organisms spill into the blood, or abscess. Fever, back pain, low bp, fast pulse, ability to eat/drink are much more important factors.