Thanks for using Healthcaremagic,
Your brother is having Thrombocytopenia
which means low platelet count the cells which are useful in blood clotting.
He should see a Physician and complete workup like Complete blood count
with peripheral smear study, Liver function test,Kidney function test and Ultrasonography
of abdomen to see liver and spleen.
In case he takes alcohol it could be cirrhosis of liver with portal hypertension
There are other possibilities also hence it is better to consult Gastroenterologist/Physician as soon as possible and go for proper tests.
Hope this helps.
Dr.Akhilesh Dubey M.D