Shaving down there aftercare

I have watched and read countless things trying to find an answer to no avail. I get super itchy after shaving down there BUT not because of ingrown or skin irritation; it’s the hair growth like a day later!! It itches me to death (and isn’t comfortable for my husband I think) Is my hair too course for shaving? What helps you with the regrowth?! Every tip is about razor burn/ ingrown hairs, not this specific problem!