Our expert says:
Hi Didu, thank you for getting back to me.
It certainly sounds like one would need to examine the skin to see if any specific cause can be found for the dryness. Such excessive dryness may have a link with a medical problem such as thyroid abnormalities, the SLE you have and even some other autoimmune diseases. My advice is to see a dermatologist who can examine you thoroughly and perform some blood tests before deciding on a specific range.
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