Can you stretch your earlobe piercing from a normal starter stud to a flesh tunnel?

It is dangerous to stretch this quickly because it can cause the skin to tear. You should use tapers to slowly stretch the hole to the size of the tunnel you want. You should be able to get tapers from a body piercing shop. Remember to only stretch from one gauge to the next largest, rather than skipping a size, as this can cause tears and scarring.