The video above shows how to evacuate blood from underneath a toenail. You can tell you have blood underneath your toenail by simply observing a bluish black color underneath your toenail. This is typically caused by trauma to the area. It can be caused by tight shoes, dropping something on your toe, tight ski boots, or getting your foot stepped on.
The key to draining the toenail, is to have an alcohol prep pad handy to make sure the needle is sterile. You need the needle to be sterile or you can introduce infection to underneath the toenail. If you do not feel you can do this yourself a Podiatrist would be the doctor to go see and have it removed. Below is what type of needles to purchase to have the toenail drained:
The next question is, will my toenail fall off and the answer is yes, most likely. Occasionally it does not fall off. If it falls off just place antibiotic ointment on the area and wait for the nail to grow back. If you have any questions or worries you need to see a Podiatrist for further evaluation.