fh band

FH is allergic to nickel, so we have been having a hard time finding a band for him. We agreed to let him wear his band to make sure nothing happens prior to the wedding. We tried tungsten and he had a red ring around his finger and now we are trying a stainless steel ring. It's been about 2 weeks and now the ring is doing the same like the tungsten ring. FH has been married before and had a plain gold wedding band (does not want another one) and this did not happen before. After getting more details from FH, I learned that he does EVERYTHING with the ring on including sleeping, working out, showering, etc. He has taken it off to allow his finger to scab and heal. Do you think this is happening be he just never takes it off to allow his finger to breathe or is this an allergic reaction? With both the tungsten and sterling silver it took about 2 weeks before a red ring happened around his finger. TIA