Genital psoriasis... (tmi)

My fiancé and I are trying for baby #1 however he has genital psoriasis. And it's causing an issue with our ability to bd on my fertile days. We have both been tested for stds. He is in so much pain when it flares up and the doctor he went to said all he can do is wait til the outbreak goes down with time. Anyone have any home remedies to help with the pain and itchiness? I just don't want him in pain and sex makes it worse and I feel awful.