Hello~I am so sorry you are suffering with the itching, I am sure it is unbearable at times.
You say you have seen many doctors, have you tried a Naturopath. They really dig deep into the issue and they can often discover some amazing reasons for what is causing the symptoms. They do blood work, all kinds of allergy testing, tests for hidden yeast infections, hormonal balance levels, etc. They might even run some tests for parasitical issues as some parasites can be the pits to get rid of and cause all kinds of trouble.
You may have some hidden chemical allergies that you are not aware of, also, some food sensitivities can cause itching.
Another cause of itchy skin could be a Candida fungal infection. Skin infections caused by the Candida yeast can cause itching, rashes, scaling, and swelling. Candida infections (candidiasis) can be caused by a weakened immune system, using antibiotics, being overweight, or pregnancy.
To prevent skin infections caused by the overgrowth of Candida in the body, it is recommended to take probiotics. This is especially true if you have to take a course of antibiotics because the probiotics help to keep a healthy balance of bacteria in the digestive system. A study in 2006 into probiotics found that they help to reduce the side effects of antibiotics and also inhibit Candida from overgrowing.
Other studies into probiotics show that they can help reduce levels of stress in people and help to improve brain function.
A great way to get relief from the itching that Candida causes is to use raw apple cider vinegar (ACV). ACV is an effective topical application to stop skin itching and to kill off infections. Mix together equal amounts of raw unprocessed ACV and water. Using a cotton ball, apply the ACV to the itchy skin for a quick relief.
You can also add one or two cups of ACV to a warm bath and soak for 20 minutes and this can help to cure whole body itching. For even better results, why not add a few drops of tea tree oil mixed with a carrier oil? The tea tree oil will also help to kill off the fungal infection and soothe itchy areas of skin.
Apple cider vinegar can also be used to help soothe itchy skin caused by eczema and psoriasis (and there are other great reasons to wash your face with ACV).
Acupuncture can also be a big help at times at stopping some itching, so can chiropractic treatments. Believe it or not, when so vertebrae in your spine and neck are out of alignment, one of the symptoms can be itching. I suggest seeing a chiropractor and telling him what you have told us; he just might be able to give you some relief.
You may also be deficient in some vitamins, the B complex would be a good place to start, I would take a high potency B complex and an added Vitamin B12; Since vitamin B-12 deficiency can lead to nerve problems, this may be a potential link if you have itching. I would also add extra vitamin A, this is the skin vitamin along with vitamin D3.
Here are some herbs that might help as well:
So, every remedy listed here is made from plants or from plant-based or food-grade substances.
•Clay. Put a bit of bentonite or Montmorillonite clay on it! ...
•Apple Cider Vinegar. ...
•Clay + Apple Cider Vinegar. ...
•Peppermint Leaves. ...
•Fresh Basil Leaves. ...
•Aloe Vera. ...
•Fruit Peels. ...
•Oatmeal.
I hope that some of this has helped and that you get the relief you are seeking. God bless you.