Warfarin and various organic solvents are among chemicals that may thin the blood. Severe pulmonary irritants include ammonia, bromine, chlorine, hydrogen fluoride, formaldehyde, and nitric acid. Be sure to apply additive calculations and take one-half of unity when two or more chemicals are present. As mentioned, heavy bending and lifting may contribute to nosebleeds by increasing blood pressure for certain people. Continuous work without drinking fluids may cause a person to become dehydrated, increasing chances that the inside of the nose will become dry.
Psychological stress can also be a factor.
Hormones released in response to strong stimuli such as fear, anger, appetite, thirst, and sexual activity cause nasal mucosal vessels to fill with blood, perhaps increasing the opportunity for nosebleeds. This explains why first aid treatment for nosebleeds includes keeping the person calm. Workplace conditions may well be among them. But there are steps we can take to limit or prevent work-related causes. Copyright 2001 by Business News Publishing Co.