Urethra burning only when dehydrated + “drop stuck in tip” feeling (18M, ongoing ~1 year)

Hey, I’m an 18-year-old male and I’ve been dealing with some urethra-related symptoms for about a year now.

The main issue is a feeling like there’s a drop stuck in the tip of my penis or like I didn’t fully empty, even though nothing actually comes out. I also get a burning or “hot” feeling when I pee, but I’ve noticed it mainly happens when I’m dehydrated. For example, recently I’ve been really dehydrated and it’s been burning more, but when I’m hydrated, it barely burns at all or not at all.

I don’t have any discharge, swelling, sores, fever, or constant severe pain. It’s more of a sensitivity/irritation that comes and goes. It also seems like it gets worse when I focus on it and goes away when I’m distracted.

One thing that might be relevant is that I used to clench a lot (like when peeing or masturbating), and I’m wondering if that could have triggered this.

Also, I’m not sexually active. I’ve only had one sexual encounter about 4 years ago, and I’ve never had symptoms like discharge or anything like that—just this irritation. This has been ongoing for a while but hasn’t really gotten worse overall, just fluctuates depending on hydration and what I’m doing.

Has anyone experienced something like this long-term? Could this be pelvic floor tension or urethral irritation rather than something like a UTI or STI?