Hi. I have been using henna and switched to color recently as i have a lot of grey hair. used Inoa for the past 2  months. And I hve developed severe reaction immed both times after use. Scalp itches badly, crusts over and there is clear discharge. No apparent issue with hair , but reaction on on scalp is bad. So theres something in INOA thats causing a severe reaction. PPD? Wondering wht to do - switch colors? I defn need to color becos of the grey. Any advice?