Hello,
The skin itching and redness can be due to eczema, thyroid diseases, liver and kidney disorders,diabetes and autominnue diseases. You need to consult a dermatologist/ endocrinologist. It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.