I had lactose intolerance for 15 years and it has disappeared.  However, I
have celiac disease.

When you have celiac disease many people also get lactose intolerance for a
short period of time - some for only 6 months and then it goes away.

I have had celiac disease for 34 years - half of my life and it never goes
away.  The only cure for it is a gluten-free diet.

Your immune system is amazing!.