Yes, there is a common genetic link between Crohn's and Lupus and many other autoimmune diseases. Those who are diagnosed with both need to make sure that their gastrointestinal symptoms are not from Gastroenteric Lupus...it can be difficult to tell them apart.
Gluten & Sulfite Sensitivity, Multiple Food & Inhalant Allergies, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD (Lupus?), Osteoporosis, Anemia, malabsorption/malnutrition, etc.
Meds: Pulmicort, Claritin, Injectable Vitamin B12, Herbs, Nutritional Supplements, Essential Oils, Homeopathy.