Hello, If you ve had skin lesions and itching and an allergic reaction is the most likely cause. If the allergy is confined to the skin then it s not very serious - albeit very annoying. If you have a lump in your throat, breathing difficulty or faintness then you should visit the ER at once! Otherwise, an antihistamine medication like cetirizine may help. If the allergy won t get better with a single daily dosage then sometimes I may advise my patients to take it twice daily. In the more resistant cases, corticosteroids may be required but you should see a doctor before that. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Panagiotis Zografakis, Internal Medicine Specialist