Is there a home treatment for severe back itching?

Hello. I don't know if it's because the room is overheated and dry, but lately I've been having a particularly unbearable itch on my back that's keeping me up at night.
I tried applying moisturizer and taking care of it on my own, but it was limited because it was an area that was hard to reach.
Among the various skin treatments available, are there any home care methods, such as ampoules, that can help with back itchiness?

I'm not sure if the itchiness is due to dryness or another symptom of dermatitis. Is it possible to get a customized consultation to determine the cause of the itchiness in this case?