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Itching occurring after operation at the site of the incision occurs due to the growth of new nerve
cells and release of histamine
at the wound site. Itching can be quite a discomfort, however its also a part of the healing process. You can try by keeping the area of that skin well moisturized, keeping the area clean, applying cool compress, taking anti-allergic medication and avoiding any irritation with the clothes. If however the itching has not improved and rashes are present, consult with your doctor for a reevaluation of the operative wound site.
Feel free for further queries.