hello and thanks for the query.
I notice that you have mentioned that your son has this problem for about 4 months now. Hence, this issue is not to be taken lightly and you need to take an appointment and see the doctor for evaluation of hematuria
rather than the emergency room where they cant think beyond emergencies! You also haven't mentioned the age of yoru son as there are different causes among different age groups.
I will mention some of the commoner causes, but remember to kindly get him evaluated early to start treatment of the cause.
Kidney stone, infection of the urinary tract
,blockage of the tract by a stone or tumor, a narrowing of the opening , Kidney diseases,blood-clotting disorders,injury
to the upper or lower urinary tract, some medications; certain analgesics such as aspirin
, anticoagulants (blood thinners),prostate
, sickle cell anemia
,infections ,or inflammation of the kidney, strenuous exercise, especially running, and sometimes even cycling.
The causes are many and varied and your doctor will advise correctly after a proper evaluation.
Hope your son gets well soon. Take care.