Fat experiences

So I gained 20 pounds fairly quickly, didn't get stretch marks.

Gradually lost the weight. About 7 years later, started piling it back on in a year or so. Still no stretch marks.

Gained another couple of pounds, but I'm still under my all-time highest weight.

But suddenly, I have bright red itchy spots on my belly. I thought it must be a rash, but it looks so much like the beginning of stretch marks.

Is this possible? Is it possible to get stretch marks if you still weigh less than a weight that didn't give you stretch marks before?

It depends on how fast you gain. Other things can cause stretch marks as well. Like doing stretches. Anything that makes the skin tight.