I have problem of itching since so many years. But it was very infrequent. But from past 2-3 months the problem has become severe. I am a diabetic also. Itching sensation is ever persistent but intense itching occurs whenever I am in a hot and humid environment. Itching causes welts and rashes to appear. And when it heals it leaves a mark. It is not limited to a particular area rather it's affecting the whole body.