sinus isit the one u every morning will get flu that kind?
sinus cavities are these gaps you have just under your eyes within
your skull.. sometimes when there are infections of something like
that, they fill up with mucus and gunk..
people think they are 'having a flu' but you are not suffering
from influenza.. you just have a runny nose
the runny nose is usually something messing up your sinus
cavities..
best if you go see a doctor..
if your sinus cavities remain blocked or gunked up, you can try
using a neti pot to clear up your nose...
remember.. for most of these things, google is your friend