Some good responses in here so far. I would only add:
Many DIY vape users apply too much heat to their material. Remember, the point of vape is not to fully consume the material; rather it is to selectively inhale only specific chemicals. To achieve that end, you must back off on the heat immediately after the material reaches vaporization temperature. Don't heat it too much, and stop hitting it! If you simply must use the material to finality, use the left overs to make butter.
Also, while far less dangerous then smoking, there are still some health risks associated with vape. For example, the resins can crystalize in your lungs causing the same kinds of damage as inhaling small particles (like those found in smoke).
If you have especially sensitive air passageways, then give them a proper rest so they can heal. Do yourself a favor: look into making canna butter and tinctures. My body thanks me when I use my own home made tinctures or weed butter put into gel caps, and I'm sure yours will too.