How do you treat a mosquito bite on a dog?

I have no idea how to treat mosquito bites, and I wonder if After-Bite, an ammonia solution, isn't harmful to puppies.

There are so many contradictory "mosquito remedies" online that I don't know what to believe.

Baking soda, vinegar (?), and/or some ice might be a natural remedy? Some sources say tea tree or lavender oil.

Supposedly, if the puppy is carrying heart worm larvae, the mosquito might incubate the larvae and later transmit infectious parasites into the puppy.

It sounds like HIV activating into the AIDS virus, but what makes the larvae mature in the mosquito carrying blood?