Hi, Thrush is an infection caused by a fungus called Candida albicans. Candida lives harmlessly on the skin, in the mouth, gut and vagina and is normally kept under control by harmless bacteria. But sometimes conditions change and the yeast increases rapidly, causing the symptoms of thrush. Causes are: Wear tight clothing, such as jeans or nylon underwear, because this prevents natural ventilation. Take certain antibiotics. Have uncontrolled diabetes, HIV or other illnesses that affect your immune system. Some allergic or contaminated (used by other) soap. Treatment. Clear and complete examination of the genital area, followed by a cotton swab test to confirm the diagnosis. If left untreated it may go off due to natural immunity. better to apply anti fungal cream + oral anti fungal tab + tab for itching. nothing to worry H/O exposure needs HIV test. Best wishes