I had severe itching of forearms that started months after I got the covid vaccine; not blaming it on vaccine just saying, and I tried so many creams and holistic approaches until someone here mentioned that they had too much histamine in their system so they used an antihistamine; which I did and it removed my NO RASH itching.
("Having too much histamine in the body can lead to a condition known as histamine intolerance, which may cause symptoms like headaches, gastrointestinal issues, and allergy-like reactions.")
Much luck to you,