My Son Has A Mildly Dilated Rv Result 27. He

my son has a mildly dilated rv result 27. He had mild fever lower than 100 but just last friday his temperature shooted at 104 i took him home from hostel now he is taking medicine and his fever is settled since the day after he has started taking medicines for fever week before hir rv was 31 but now 27 still little dilated because of his temperature rest all his blood and urine test are clear probably he had infection in rv what do y think