How long does it take for the epidural to work?

I do agree with what Dr Ethan and Dr Jasmine have written about the risk of colchicine in breastfeeding. For treatment of oral lichen planus, there are many other treatment options available apart from colchicine and you should speak to your doctor and raise your concerns about the use of colchicine while you are breast-feeding and explore if alternative options are available for you.

May I ask if are there any concomitant vaginal discharge or bowel symptoms? The complaint of just isolated itch alone is a little unusual, especially if there are no skin changes. In essence you would need it to be looked at by a doctor, and two main conditions excluded – either pinworms or lichen sclerosus. If both are ruled out by the doctor, then you might want to consider perhaps a short course of topical corticosteroids eg mometasone cream.