Why am I getting stretch marks?

I'm not super fussed but obviously not ideal.

I'm 22, male, and I think they've been popping up more frequently and getting a bit larger recently on my inner thighs.

Was super active in uni and when lockdown hit (have graduated now) I'm not doing an awful lot at home.

Would be lying if I said I'm in as good a shape as I was back then but have only put on a little weight.

I've only seen that causes are puberty, inherited (in terms of likelihood of having them), some weightlifting related stuff and 'rapid' weight gain.

Though I've gained a little weight, certainly doesn't come close to rapid weight gain?

Re home exercise I've mostly done hula hooping, dumbbells, press ups, squats and karate.

Since I haven't rapidly put a lot of weight and it doesn't seem to run in the family, I thought maybe it's the squats, karate kicks and stretching the leg/groin on the staircase (think a ballerina L shape lmao)

Any ideas folks?

I don't think certain movements like squats, karate kicks etc can cause stretch marks.
Stretch marks are always weigh-related.

If you have gained weight, it doesnt have to be much weight to get stretch marks. It's more about how fast the weight goes on rather than the amount of weight.

Honestly, although im a girl, i have stretch marks on my legs, hips etc and i genuinely dont care anymore. There are worse things to have.
So like don't worry about them. They are normal, even in men. My ex-boyfriend had loads from rapid growth during puberty. Just focus on being healthy and fk the stretch marks.

I don't think certain movements like squats, karate kicks etc can cause stretch marks.
Stretch marks are always weigh-related.

If you have gained weight, it doesnt have to be much weight to get stretch marks. It's more about how fast the weight goes on rather than the amount of weight.

Honestly, although im a girl, i have stretch marks on my legs, hips etc and i genuinely dont care anymore. There are worse things to have.
So like don't worry about them. They are normal, even in men. My ex-boyfriend had loads from rapid growth during puberty. Just focus on being healthy and fk the stretch marks.

Yeah stretch marks can be due to loads of reasons, rapid weight gain or loss, growing too fast, basically anything that over stretches the skin. The best thing that you can do is just embrace them!