<s>[INST] Hello doctor, Just wanted to know that from last two times, whenever I get my periods I get this cold sores and rashes like allergy happens on the linings of my lips. The last period date was 17th of the last month and I got this allergy and cold sores like blisters all over my lips and lining of my lips and get normal after, almost 10 days. And this time also I got my period on 17th of this month and the very first I developed this blisters on my lips more like rashes. Presently, it is still there. I wonder why this is happening from the last two times. It never happened earlier. Please advise. [/INST] Hello. The allergic rashes if they are occurring specifically during menses and the only line the vaginal lips then the cause is unlikely to be menses per se but rather the material of the sanitary pads that you are using from day one. If you have changed the brand of the sanitary pad lately then please revert back to the earlier one and in the meantime, you may apply ointment Candid-B locally over the labia minora and majora over the rashes thrice a day and try to keep the local area dry as much as possible. Also change pads every 3 to 4 hours, again depending on the bleeding. If possible please share the picture of the lesions to rule out allergy from herpetic eruptions. </s>