You are suffering from fungus infection which is common.Avoid scratching, it will cause infection..the pus is coming due to this only..
use V gel a local vaginal cream it l reduce your itching. Also wash this area with TRIPHALA
decoction (by boiling triphala pawder in water).This simple remedy will work as fast relief.Tab Flucan once in week for three week only.
Avoid siting long time in one place. If weight is more reduce weight.