Histamine Food Intolerance
This is a repost from a few days ago with some added information related to mayo and the body wash I use to reduce the itching.
I am a 70-year-old male. After my bout with COVID in March 2020, I began to notice random itching, primarily on my scalp and upper back (shoulder blades), arm pits along with an itchy nose. I would also get sporadic small skin eruptions which resemble hives on my upper back and scalp. I could go for weeks without itching and then all of a sudden, it was back. I had already given up gluten in March 2021 so I knew that gluten was not the cause. From trial and error, I found it was related to foods which cause histamine release. Histamine release causes itching! I had never had this response before COVID or been “allergic” to any foods. The itching begins within two hours of eating any of the following foods and usually continues for about 24 hours. I have seen a dermatologist and they did not find anything which seems reasonable, given that my skin appears “normal”.
Although l tried to reintroduce the following foods, one at a time, each time that I did, the itching returned. I therefore don’t eat: Tomatoes or salsa, peanuts, pistachio nuts, spring mix, or yogurt. Mayo also causes itching because of the vinegar in it which causes the histamine release. I also avoid chickpeas. I continue to use pea protein as my gluten free protein source.

Opinion: To reduce any of my itching, I use Botanic Hearth Tea Tree body wash which has a high percentage of Tea Tree oil. I use it as a hand wash, body wash and shampoo. This works for me. It may not be appropriate for everyone.