Back to your dermatologist or plastics, as this maybe due to many causes including 1. Normal reaction - passes, density and intensity controlled by your specialist who performed the HALO procedure 2. Irritant dermatitis, 3. Contact dermatitis, 4. Early focal infection 5. Overtly sensitive skin . Now if it FEEL awful, this needs further investigation - if there is PAIN, its usually an infection. More information needed. Your specialist will go through points 1-5 , take swabs and go from there. HALO itself is a great lasers, so flexible in the parameters it can deliver. This many be a bespoke treatment with high passes, only your specialist will know the answer, as we do not have the treatment protocol he or she used on you. Dr Davin S. Lim. Brisbane. Australia.