What is the cause of this stomach pain?!

So, my father is 54 years old, and has been experiencing very bad stomach pains for the last two months!. He is stubborn and won't see a doctor, but I am now FORCING him to!. He gets pains almost everyday, most of the time after eating or in the morning!. He said he doesn't really have gas, so I do not think it is gas!? He used to get heartburns often!. This past week, he has been having a hard time going #2, it has been about four days now!. Please tell me what you think this is!? I'm beyond nervous!. Thank you kindly!.Www@Answer-Health@Com

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