What symptoms should I watch for related to low white blood cell count?

When white count is low, you need to be on the alert for fever, which is usually the first sign that the body is fighting off an infection. Someone with low white cell blood count has less resistance to colds and flus, so those are definite threats, but other kinds of infections can appear as well. Gastrointestinal infections may show up as cramping or diarrhea, while a bladder or urinary tract infection makes it hurt to pee. Even a tiny cut or scratch can become infected, so watch for redness, swelling, pus, or tenderness around any wound. Also keep an eye out for sinus infections, usually evidenced by a stuffy nose or headache; rectal bleeding; or signs of lung infection such as coughing up fluid.