Hello, It could be definitely climate change but this nosebleed is a vicious cycle which happens. Once, it bleed and you will remove the plaque which even again causes bleed that will form the crust and the crust is again removed which causes bleeding this cycle continue in the nose. So, in order to break this, you should not remove any crust hardly pulling it. Either softens the crust with water or oil and then afterward removes it slowly without hurting and causing bleeding. Take good foods and more of liquids and drink a lot of water. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Archana