Hi, The itching can be an allergic reaction to excessive sweating /the fabric of the undergarments you are using. Especially so if they are very tight&you wear thick or synthetic trousers. The answer would be using cotton (hosiery) & loose fitting undergarments & also light & thinner pant material_avoid pants &use maxi/frock to keep ventilation. Have clean bath twice-three times a day. Use talcum powder in daytime &steroid skin ointment mixed Multifungin-H ointment to be ribbed gently before sleeping. Consult a dermatologist in case of no response in a weeks time. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Vasudha Jayant Athavale, General & Family Physician