Autoimmune Disorder More Condition_symptoms How Could One Tell Whether Their Physical Symptoms Are Related To Stress/anxiety Or An Autoimmune Disorder?

How could one tell whether their physical symptoms are related to stress/anxiety or an autoimmune disorder? - autoimmune disorder more condition_symptoms

I refer to symptoms such as ...
* Joint pain
* The stiffness
* Stiff neck
* Rash
* The swelling and water retention
* Swelling or irritation of the eye
* Photosensitivity
* Poor circulation in hands and feet (the doctor is very worried)
etc. etc.
I Knoevenagel that several of these symptoms are also anxiety disorders and autoimmune diseases.