If the particles seem solid, like grains of rice, then maybe there is some cause for concern but I suspect they were really just clumps of cum that got left in the urethra, the tube that runs up the inside of your penis, that were then pushed out as you pissed.

When first ejaculated, cum becines thick and if then mixed with water tends to stay in clumps rather than blend in. If you leave it for a while first, it thins out again and will then mix more easily with water. Piss is mostly water so the same applies there.

That definitely sounds like left over cum.

There will always be a little bit left inside but there are a couple of things you can do that would reduce the amount:

• Don't stop stroking as soon as you feel the orgasm start but keep going until the last spurt it out
  
• Afterwards, run you finger up the bottom of your penis from balls to tip to push some of the residue out the tip.
  

Also, don't do anything to block the cum coming out at the end of the wank. If, for example, you put your finger over the hole at the end of the glans, pinch your penis or put pressure on the perineum (also know as the taint), i.e. the space between your balls and arse that would definitely increase the amount of cum left inside at the end and may even cause some to go backwards into the bladder which would also come out next time you piss.

BTW, lots of us find a need to piss shortly after cumming and it has been suggested that this is partly to restore the pH in the urethra. Piss is slightly acid and cum is slightly alkaline. Most bacteria don't like an acid environment.

you sure they weren't bubbles?

Yea it’s normal to have some “leftovers” in your pee. As long as it doesn’t hurt you’re probably fine.

I’ve always gone to the bathroom after I’ve masturbated. I’ve always thought that it’s good to clear things out after you masturbate.

Usually always pee after jizzing. You had left over cum there. All good.

Nothing to worry about, probably just some "leftovers" being washed out, which is a good thing.

I heard boys are supposed to pee afterwards

Yes bc you cant piss while masturbating so yeah it seems normal

I heard both boys and girls should. Specially girls. Sometimes I do. Not always.

Everyone should always try to pee after making cum. Even if you don't think you have to pee, at least try.

If you have the foreskin, don't pull back. Pee "through" the skin.

If a quick shower isn't a possibility, no matter what's between your legs (foreskin, no skin or no penis), you should at least take some toilet paper and wipe really good.

Of course, if you have foreskin, you should always pull it back in the shower.

I had the same thing today.I saw that my pis was mixed up with cum. So you are not the only one