Thank you for the query.
It sound like the cause of your symptoms is abdominal hernia
. It is a hole in the abdominal wall through witch abdominal cavity contents are getting out of it. Usually some lump is present but as you have said you are overweight
so the hernia may be hidden inside the fat tissue. The pain can come and go, can be triggered by coughing or lifting some heavy objects. If it is really hernia, there is a risk for intestines to get stuck in it and result with ischeamia and necrosis
. That is why you should visit your doctor and do not neglect it.
To rule hernia out, abdominal ultrasound
should be performed. If hernia will be ruled out, some other tests might be necessary like full blood work, liver tests, pancreas tests, upper GI endoscopy
But first, abdominal ultrasound should be performed.
Hope this will help.