me and my brother have recently got into spear fishing. after about an hour of being in teh water both of us have been getting what it appears to be blood in our nose if we blow it. we are both have swam our entire lives and spent a lot of our summers as kids on the beaces in rhode island. i spent a lot of that time snorkeling but never took up spearfishing before. i didnt know if this was something to worry about or there was someting i could do to prevent it. thank you for any advice you can provide