Poor adjustment, excessive use, worn shoes and/or drums, bad slack adjuster and/or brake chamber (if equipped with air brakes).
i have a 93 nissan and the front brakes are getting hot when driving
the friction between the brakes and the wheels.
Friction makes brakes get hot. Whenever you step on the brake pedal, the kinetic energy of the vehicle is converted to heat energy to stop the vehicle. Having said that, the brakes can run a little hot if the calipers are not fully releasing and the rear brakes can overheat if you fail to release the parking brake. It's extremely rare that the master cylinder doesn't fully release the brakes.
Either your brakes are sticking or they are adjusted to much.
This could be for a few reasons, but if they are getting hot without you applying them, I would suggest that they are sticking and causing the pads to rub on the discs, or if they are drum brakes, the shoes on the drums. If they are only getting hot as a result of using the brakes, I would suggest checking that the brakes are balanced properly, and that the front brakes are not doing all of the work/ or that the back brakes are working at all.
Brakes are adjusted too tight. Brakes are misassembled. Brake hose is restricted, holdings the brake on.
Be more specific. What about the CRV is hot? Tires? Brakes?
make sure it's not the rear brakes hanging up, see if they feel hot, if you have drum brakes on the back a wheel cylinder could be hanging up.
just keep driving, if your have not checked your brakes then i would get a professional or you could take off your tyre and look at the brakes. consider getting new ones if they are looking damaged
It could be air in the brake line, or the brakes getting too hot from too much friction by using the brakes on a steep hill or riding the brakes, or there could be a problem with the master cylinder.
The brakes or rotors could be making the rear driver tire get hot on a 1995 Nissan hard body.
The engine is the cause of your rear driver side wheel getting hot.