You can make a good home made diaper rash cream by mixing together some shea butter, coconut oil and beeswax.
Once you have those ingredients mixed together you place it into a saucepan or a double boiler and add about an inch of water and then boil the diaper rash cream for a bit.
This will make a good home made diaper rash cream that is all natural for your babies diaper rash.
Giving your baby an oatmeal bath can also work to clear up diaper rash naturally so you can give that a try also.
After you get the diaper rash cleared up, you should always check your babies diaper at least every 2 hours and change the diaper often even if it's not fully wet and if your baby poop's in his/her diaper it should be changed as soon as you notice it.
Regular diaper checks should be done to ensure you don't leave your baby in a dirty or wet diaper for too long.
You should always wipe the urine off your babies skin as well when changing their diaper since urine on the skin can turn to ammonia overtime and cause the diaper rash to appear which is very painful.