The Capillus 272 uses densely packed LED's to help stimulate hair growth. It is possible that generation of heat from this device can cause burning and irritation in which case it should probably be discontinued.
If you have bumps on the scalp in addition to the warmth, you may have folliculitis which would require antibiotic therapy.
Have you considered cellular therapy for your hair loss? It requires no ongoing maintenance and can be very effective.