Hi,
Welcome to the forum. Itchy spot can be due to use of sprays, douches, creams/oitments. Shaving vagina every next day can be a cause of allergy/sensitiveness of skin, perhaps you have over done it. You should stop shaving for a few days. Wear loose cotton pantyhose, take care of your hygiene, wash genital area with warm water every time you go to the restroom. Keep the genital ares dry. Avoid sex till you are not fine.
It can also be due to infection through use of toilet papers, yeast infection or
STD. Get examined clinically. You should also get vaginal cultures, urine test (R/E,C/S),
blood test for
VDRL,etc done.
On the basis of the infection detected you will be treated with anti-fungal medications, vaginal suppositories, antibiotics,etc. Treatment depends upon the severity of the infection detected.
Take calcium rich diet, diet high in protein balanced with fruits and veggies will be helpful for you. Take care.