Was reading a few posts earlier and found something interesting that Greygoose said.
When I was first diagnosed with Hashi's in 2013, many people on a thyroid forum, not this one, told me that this would be the start of your autoimmune journey. One leads to another and once my thyroid is destroyed by the anti-bodies, they will go one to cause other issues which will result in things like Coeliac, Lupus, MS, Arthritis, etc.
Obviously this scared me. I have some walking issues and I feel varyingly rubbish and ok, but mostly rubbish. The first Endo I ever saw told me my thyroid was destroyed long ago. Other Endo's have not agreed with this. I go to an Endo department of a hospital and you see whoever is on that day.
I saw Greygoose mention that the antiibodies from the Hashi's will not go on to destroy other areas to cause other autoimmune diseases, (please correct me if I have misunderstood).
So what do these antibodies do in your body when the poor ole thyroid has gone?
Sorry to sound a bit dumb.