Have you tried different gels? I have a few areas that break out with most gels where it digs deep. The shave butter has worked well, and Target has an oatmeal based one (think it's an off white bottle, don't recall brand) that worked better than stuff that cost double.
Ive tried everything. Gillette razors and shave gel are all ive used for 20+ years with no issues. The DSC butter, preshave and aftershave leave me burned to hell. The razors leave me looking like Buffalo Bill tried to **** me.