My skin is itchy and not healing from derma needling, possible allergic reaction? (Photo)

It's difficult to tell from your picture. It can take several days for micro needling results to settle. I recommend following up with a cosmetic dermatologist for skincare and after care recommendations. We suggest all patients follow up with facials like Silk Peel Dermalinfusuion to hydrate, exfoliate and provide the skin with antioxidants. Sun protection is also essential. If it doesn't resolve in a few days, please consult your physician and get vascular laser treatments to decrease the redness and swelling -- excel V, v beam/pulsed dye laser, or yellow laser.  LED therapy with lightstim right now would also help. I always combine microneedling with prp and lasers to get the best outcomes. We do treatments every 3-6 weeks. Best, Dr. Emer

Try using a mild cortisone cream or any anti-inflammatory even a nice collagen sheet mask placed in the fridge before application can sooth the irritation. If the problem persists then I recommend calling the office you had the procedure at.