Brief Answer: Detailed below. Detailed Answer: Hi, Thanks for writing to us. Here are the probabilities for your symptom: --dryness of the perineal skin. Considering your age, perimenopause or menopause, which is the most common cause, is excluded. The other possibility is a hormonal imbalance that may lead to dry skin. Nutritional imbalances and obesity are some more causes. --soreness is the result of constant rubbing of the thighs together; this could be more if you are overweight. --worsening of the symptoms during a period is likely to be due to the use of sanitary napkins or tampons which increase the local friction. A local examination by an expert should help clarify the issue. Simple dryness can be relieved with the help of local applications of olive oil based lotions or calamine-based lotions. General treatment may be needed for other related causes, like hormonal supplements and mineral supplements. Hope your query has been clarified. Please feel free to contact if you need further clarifications. I will be happy to help. regards, Shanti.V.

---