Internal vaginal itching can be caused by several factors, including infections (such as yeast infections, bacterial vaginosis, and sexually transmitted infections), hormonal changes (like those experienced during menopause), chemical irritants (such as douches or scented products), allergic reactions (to latex or spermicides), and atrophic vaginitis (common in postmenopausal women). 

Associated symptoms may include abnormal vaginal discharge (which can vary in color and consistency), an unpleasant or fishy odor, pain or discomfort during urination or intercourse, redness and swelling of the vulva, a burning sensation, soreness in the genital area, light vaginal bleeding or spotting, and skin changes such as dryness or thickening. These symptoms can vary depending on the underlying cause of the itching, and their presence and severity can help guide diagnosis and treatment. 

Persistent internal itching should be evaluated by a healthcare provider to determine the appropriate course of action.