Getting your body back in shape naturally is certainly the top option to pursue. You may find some useful information for your skin in one or more of these articles:
One of the more common side effects of Lupus is skin problems. My late grandfather had Lupus, btw, and I can remember him smearing a stinky gray salve on his legs every day. Lupus is a chronic autoimmune disorders. Many immune disorders may be helped by using items which are natural immune modulators. Some of the best are:
Magnesium
Vitamin D3 (from sunlight as much as possible)
Curcumin/Turmeric (Curcumin is not very bioavailable. Unless you get a highly bioavailable form, coconut milk and/or black pepper help somewhat with absorption)
Blackseed Oil (Nigella sativa)
Oleander extract (not the toxic raw plant, but properly prepared oleander extract).
It is worth noting that magnesium deficiency has been strongly associated with autoimmune disorders and it has been estimated that anywhere from 70 to 95 percent of us are deficient in magnesium.
Likewise other mineral deficiencies have also been associated with autoimmune disorders and a host of other problems - and most of us are deficient in multiple minerals. A good whole foods derived mineral source is likely a good idea for most of us. Sea vegetables are a good source, as are the so-called supergreen food powders. There are also whole food derived mineral supplements.