What are the main differences between health issues and safety issues ?

The main difference between the two is that health issue is what makes the worker ill due to the nature of his work and safety issue is what could cause the worker to have an accident which may cause loss of life or property.

Health Issues I guess due to biological hazards and are sicknesses, diseases, contracted through contact with affected personnel, or food poisoning, gas inhalation, etc, which affect a persons ability to work and may also be contagious and spread to others so may also require quarantine.  Company has to then spend on hospital bills, food, transportation and suffer man hours lost and body repatriation costs in some cases.

Safety issues i guess are those which arise due to not following safety rules and not implementing safety rules or no risk assessments conducted at all or Risk asessments carried out long time ago and hazard conditions have changed.  Vehicle accidents, slips, trips and falls, electrocution, severing of fingers &  limbs, bad physical work environment, bad ergonomics, etc.  This could cause damage to humans as well as property.  Companies then end up being dragged in court depnding on what has happened, legal fees, compensation for injuries and damage to property, insurance monies, loss of business due to bad image, loss of contracts and trust of employees resulting in high attrition and then the cost of more reccruitment and also loss of man hours if personnel are injured.  

Hence, key is risk assessments, control measures to be thought of and training, training and training

I'd just call an ambulance, but as I know, it's better to give aspirin in that case. I'm not sure whether it's common or not, but even I try to prevent myself from having it since it's a syndrome due to decreased blood flow, and recently, I started taking these gummies https://www.cornbreadhemp.com/product/full-spectrum-cbd-gummies/ to normalize my blood flow since I've read in an article that CBD products are actually beneficial for that, and by far, I've been feeling pretty good.