Hi,Dear,Good Morning and Thanks for your query to my virtual Clinic At HCM.
I studied your query in depth and understood your concerns .
Causes for hard bulge above belly button are as follows-
Mostly they are ?Secondary tumour post- cancer removal.
Check with ER Surgeon to resolve the worry for hiatus hernia-post
cancer Surgery.
Don't worry of them,as they could be relieved with proper treatment.
Hope above reply would help you to relieve of the issue you have.
Welcome for any further query to ME and HCM.
Wishing you a Fast Recovery.
Write Good review for the benefit of my new patients.
Click thanks ASAP after this.
Have A Good Day.
With Regards
Dr.Savaskar