Husband quit drinking alcohol a month ago and skin itches, keeps him up at night even when taking antihistamine. related to quitting drinking?

Not expected.: Alcohol usually worsens itching unless one has drunk oneself into a semi-stupor. Not all itching is induced by histamine and thus it may not work at all. Dry skin is the most common cause for itching without a rash, consider applying a moisturizer <3 mins after bathing to see if this helps. Make sure that no new medication or supplement was introduced shortly before the onset of itching.