If you really can't move your arm because of the sting, and there is pus, the best thing you can do to yourself is go to the Emergency doctor. You can take an ibuprofen if the pain is too hard.
<span>Being in the middle, rather than at either extreme, of the health continuum maintaining a balance of physical, mental/emotional, and social well-being? I can't tell where the options are separated but that sounds reasonable to me...</span>
The best possible way to verify claims a manufactures makes about a supplement's safety and effectiveness would be to go to the manufactures website and look at the reviews, research the studies behind their product and ask around. Since supplements are usually regulated by the FDA, manufacturers are basically given the "honor system" to provide accurate information to consumers. Doing your own research will help immensely. If you ever see something on a supplement(s) that says, "This statement has not been verified by the Food and Drug Administration", I would take it at my own risk.
A suffering overuse of injuries
The backhanded hit would be a low hit not a high hit.