Is this phimosis or a short/tight frenulum?

I'm a 21M and I'm trying to figure out whether what I'm experiencing is phimosis or a short/tight frenulum (frenulum breve).

When my penis is soft, I can retract my foreskin completely without much difficulty. However, when I'm erect, the frenulum becomes very tight and pulls strongly. I can bring the foreskin forward again by gently stretching the skin from underneath.

The foreskin itself doesn't seem particularly tight when I'm soft. The main issue seems to be the frenulum becoming very tight during an erection.

For people who have experienced something similar:

- Does this sound more like phimosis or frenulum breve?

- How can you tell the difference?

- Did gentle stretching work for you?

- How long did it take before you noticed improvement?

- Did you use any cream? If so, was it prescribed?

- Did you eventually need frenuloplasty?

- If you had frenuloplasty, what was the recovery like?

- Is there anything I should specifically avoid doing?

I'm not looking to deliberately tear or cut the frenulum. I just want to understand what condition I might have and what the safest treatment options are.

I'd appreciate experiences from anyone who has dealt with this.