Thanks for query,
all of a sudden hair fall
indicates that you might have some problem on your scalp.
If you have dandruuf,seborrhic dermatitis
on scalp sudden hair fall is there.
Find out the cause and go for treatment.
Another causes are stress,anaemia
and deficiencies of vitamines.
Apply good branded hair oil containing Vit E.
Use branded shampoo and conditioner,
Do not keep your hair wet for longer time.
Take more green veges and fresh fruits.
ok and bye.