Hi, thanks for your query As per the details mentioned by you , it seems that the problem started with contact dermatitis due to the new fabric of pants which worsened to infection due to scratching of the skin. Once you itch , you feel a sense of relief but soon you have a sensation of increased intensity of itching every time to the extent that bleeding occurs. This is SCRATCH ITCH CYCLE which is most challenging part of the treatment. You are right ,dry skin aggravates itching. For this you may do as follows: -Avoid scratching the lesion instead apply ice or cold compresses which decrease itching -Take oral antihistaminic for itching like cetrizine in the morning and fexofenadine at night for a few days to break the scratch itch cycle after prescription -Oral antibiotic for 5-7days Keep your skin well hydrated with moisturisers Use mild cleansing agent or syndet based soaps Wear loose fitting cotton cloths Get your blood sugar checked You may approach a dermatologist for examination or upload your pictures on our site . Hope this solves your query Wish you a speedy recovery