6 mo old male cat dried blood around his...uh...manhood

I have a 6 month old male kitten, I am unsure of his breed because he was rescued. He is mostly light gray with some beige and white patches and a few dark gray and white stripes. He has a tiny face with big eyes and big ears that stand nearly straight up. 

I've noticed that since I brought him home, he does have allergies. My chinchilla's dust bath and hay drive him crazy, he sneezes when he cleans himself constantly, and he sneezes when I vacuum--so I bought an air purifier and bath him every other day with hypoallergenic pet wipes.

He is much smaller than his brother (who looks completely different and is a dark gray tabby), but they are from the same litter. 

Today I was grooming him and I noticed some dried blood on his belly fur. It was only a small drop, but as I examined him more closely there was more dried blood around his penis. The tip was a darker shade than I've ever noticed it to be before and it was not at rest. 

I proceeded to check the rest of his body and the only other thing I noticed is that his nose is slightly runny. 

He is not neutered yet, but he will be next month. 

What should I do for him? What could be wrong with him? 

He could be having a urinary tract issue and should probably be looked at.

Chromium Blues said:

 
He could be having a urinary tract issue and should probably be looked at.

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That is my first thought as well.  I would give your vet a call; some issues can be very dangerous.

The bleeding stopped shortly after I made this post, but he does have an exam in a few days (that was the earliest I could get an appointment) along with shots and neutering next week, so hopefully everything stays normal until then! Thank you for the help!!