My son's left nose is bleeding for 3rd time this year. he didn't complaint any sick or feeling not well. is it normal? bcoz the weather here not so hot

This is not uncommon: Having a nose bleed 3 times in one year is not something too uncommon or dangerous. It is more common in conditions where the air is not very humid - and the nostrils become dry. He may have allergies that are contributing to the bleeding too. If he sneezes a lot or has frequent runny nose he may have allergies. Allergies often cause the inside of the nose to itch, which leads to scratching...