2 weeks back, my son 9 years, complaint pain in lower abdomen and burning urine. Later, he suffered from fever 100 F bad throat. U/S indicates mesenteric lymph nodes are inflamed with larger 21x10mm. Rocephin IV for 3 days were injected. Fever vanishes and WBC & ESR results before & after treatment are: WBC before 28,000/ul and after 10,000 u/l ESR before 40 mm/hr and after 95 mm/hr Why ESR become more after infection is over and what is treatment? Regards/Arshad