I posted some comments six months ago about how sweat therapy has gotten rid of my hives. It hasn’t been easy, but I have been able to work out 5 or 6 times a week with the sole focus on sweating.
I wear heavy sweat clothes and engage in high intensity workouts that help me sweat quicker and for the duration of the workout. I have found that I need at least 30 mins of active sweating to resolve the problem for the day.
I also try to take a hot bath or sauna at the gym and induce sweating that way if I can’t get in a quality workout. I combined this with intermittent fasting (eating within a 8-9 hour window everyday) and for the time being I am cured. The combination of the sweat therapy and time-limited fasting cured me. No medication was required.
I hope this helps,