Dreaming of nosebleeds may imply that the dreamer's self-esteem has been hurt or hit, or it may imply that the dreamer feels that his ability in some respect has decreased.
Physiologically, your dreams may be caused by physical reaction or bedroom environment. If your nose is uncomfortable recently, it is recommended to see a doctor. If you have the same dream all the time, it generally means that the dreamer has not solved some important information of the subconscious (dream) and is still struggling to explore.