Answer:
What causes vaginal yeast infection?
Candida albicans are present in vagina of healthy female. When there is increased in number of fungus leads to vaginal yeast infection.
Although yeast infection is not included in STD (Sexually Transmitted Disease), Sex with infected person can transmit this disease. This organism is present in vagina, contact with vagina or vaginal discharge transmits the infection.
Some bacteria present in women vagina which protects infection from other micro-organism. Use of antibiotics can kill this bacteria giving better environment for Candida albicans to develop.
Patient on chemotherapy, immunocompressive drug are highly risk to yeast infection.
Excessive washing of vagina and douching can change the chemical balance of vagina causing risk of developing vaginal yeast infection.
For self treatment try this link: http://medxn.com/yeast-infection