I have severe itching inside the vagina and anus. The

Hello
There are so many causes for itching of vagina and anus and the treatment is according to the reason.
The following are the common causes
• bacteria
• yeasts
• viruses
• parasites
• environmental factors
• allergens
• sexually transmitted infections
• chemicals
• menopause
Bacteria
Overgrowth of certain bacteria can cause Vulvovaginitis. These bacteria includeStreptococcus, Gardnerella, and Staphylococcus. A bacterial infection typically causes a grayish-white discharge that smells fishy. However, about half of women with this type of infection have no symptoms.
Yeasts
One of the most common causes of vulvovaginitis is Candida albicans. This yeast infection typically causes genital itching and a thick, white vaginal discharge. A yeast infection often follows use of antibiotics. Antibiotics can kill the antifungal bacteria that normally live in the vagina. This can lead to yeast infection.
Viruses
Viruses that can cause vulvovaginitis include herpes simplex and human papillomavirus (HPV).
Parasites
Pinworms, scabies, and lice can cause inflammation of the vulva and vagina.
Environmental Factors
Poor hygiene and allergens can cause this condition. Tight clothing can rub against the skin and create irritation. Irritated skin is more susceptible to vulvovaginitis than normal skin. Irritation can also delay recovery.
Sexually Transmitted Infections
Vulvovaginitis can be caused by the sexually transmitted infection trichomonas vaginitis. This causes genital discomfort, itching, and a heavy discharge. This discharge can be yellow, green, or gray. It often has a strong odor. Chlamydia, gonorrhea, and herpes can also cause vaginitis. These infections in a child might indicate abuse. However, some of these can be transmitted to a child without sexual contact.
Chemicals
Some chemicals can cause vulvovaginitis. These are often found in:
• soaps
• bubble baths
• feminine sprays
• perfumes
• vaginal contraceptives
Nonspecific Vulvovaginitis
Sometimes vulvovaginitis has no known cause. It is frequently diagnosed in young girls who have not yet begun puberty. Doctors believe this is due to low estrogen. When puberty begins, the vagina becomes more acidic, and the infections usually stop.
In your case as there is no discharge and bad odor the chemical and non specific causes should be considered.
In my opinion you should be examined by a doctor and vaginal PH should be tested to see any infection.
Thank you