Yes. Also "inflammation and pain in the joints" can be mistaken for Rheumatoid Arthritis (RA).

We discovered the hard-way that my late wife had issues with this. Multiple doctors diagnosed her with both RA and Lupus. When we got the Nightshades out of her diet and switched to more natural based cleaning products, such as Hemp based soap, shampoo and vinegar for cleaning, her symptoms of RA and Lupus went away. An good allergist finds things like this.