I wasn't really sure where to post this, so....

You know when a woman is pregnant and their navel becomes an "outie" towards the end of pregnancy? Well, this has happened to my dad recently. He thinks it is just because he has gained a lot of weight and it's because of that, but I have never seen an overweight person's belly button change from an innie to an outie because of weight gain. I have only seen it in pregnant women.

I'm worried it might be a symptom of something internal going on? He had a hernia a long time ago when he was a teenager, but no problems since. I want him to get it checked out, but he is in his late 50s and scared of doctors.

Any advice? Thanks in advance!