Hello, Welcome to HCM Cellulitis is a bacterial infection involving the skin which specifically affects the dermis and subcutaneous fat. It is commonly caused by streptococci and Staphylococcus aureus. Elderly people,immunodeficient people and diabetics are particularly vulnerable to this condition. Cellulitis is most often a clinical diagnosis. As in your case,doctor has told you that you have cellulitis,seeing an allergist wont help much. I would suggest you to take a full course of antibiotics after consulting your treating doctor. Hope you are happy with the answer. Thank you