Dear friend, welcome to HCM!
Are you becoming obese
or only the belly is distending?
Over how many days has this happened?
Is your belly button stretched horizontally?
Fluid in the abdomen (ascitis) causes it and not obesity.
With frequent urination
and distended abdomen, ascitis and tumour should be ruled out.
Please see your physician and get evaluated physically and sonographically.
If there is free fluid or tumour in the abdomen, cancer should be considered in the differentials.
Take care and please keep me informed of your progress.
I hope to have answered your query satisfactorily.