Yes mouth sores are a nasty part of lupus for some of us. For me 3-5 mg of folic acid daily helps keep them away. There are also 2 other Rx's your doctor can give you, one is magic mouthwash which the pharmacist mixes up for you and the other is a dental paste.
I hope you find some relief! Take care
Trust in the Lord with all thine heart, and lean not unto thine own understanding ~ Proverbs 3:5 ~
DX: Lupus, Sjogrens, Raynaud's, Hashimoto's and Celiac Disease
RX: Imuran, Plaquenil, Methotrexate, Flexeril, Piroxicam, Levoxyl, Folic Acid, Folgard OS (B12), Vitamin D-50,000 IU, Tramadol (as needed) and magic mouthwash (for mouth sores)