Hi, my answer might sound odd, but its from an eastern perspective. My main source of income is from my Traditional Chinese Medicine practice. Crying, anger, and stress are all signs of yang influences. Character traits of anythign Yang include the following: change, heat, movement, upward or outward motions, and light. Stress and the other yang influences that you get tend to increase the amount of heat that your body generates, espeacially in the lungs and air passages, espeacially your nasal passages. When your nasal passages heat up too much they dry out and can crack open. This is why you notice nosebleeds around the time of your greater stress. The cracking of the nasal passages can happen very quickly because your exhaling of breath is one of the main ways the body dispells heat, and during and immediately after stressful times will be when you are most overheated. Think about a time when you got into a heated arguement with a friend or family member, you probably felt a little feverish. In actuality you're warmer than you realize because the adrenaline in your body is preventing you from feeling the full effects of the heat. When this happens you're best bet is to put some cool water on your skin or a moist towel. Nothing too cool, and don't drink or eat anything ice cold, this will cool your core temperature too much and cause you to overheat een more. This is also why people at state fairs tend to passout after eating icecream to try and lessen the heat. I hope you found this helpful.