hello everyone ... i  have almost 10% of my hair turned into white hair
in age of 18 (4 yrs ago ).... i want to know what can cause it ....

1.can sinus infection cause it . ( i mean common cold ) .. i always get
cold from my birth in cold season ...

2. Can depression cause it ?  3-4 years ago i was very depressed due to
low marks in college exams .

3. can leaver problem ( digestion problem ) cause it ... a friend of
mine told me that  leaver ( i dont know how to spell it exactly but its
something we have in our body to digest food ) .. problem cause it ....

also i   am feeling throat irritation at my right side of throat ...
when i try to excell a  white color  puss (  fluid that usually comes
out of nose ) comes out ..  why  it is falling in my throat .. ?? can
it be due to medicines that i am taking is drying my nose ? ..

                    Thanks
                       Ankur