I have Hadshimoto's Thyroiditis and hypothyroidism. Initially, prior to being diagnosed, my body was in a lot of discomfort. My joints hurt. I was so fatigued.
Once I was diagnosed and stabilized on Synthroid/Levothyroxine, I improved drastically! (I didn't have skin issues or rashes at that time.
It's been 15yrs. since my diagnosis. Two years ago I began having rashes and lesions on my legs. I was diagnosed with Lichen Planus on my skin. The rash, lesions etc... flare up and down for me. The severely of it varies a lot. You might want to research this. Unfortunately, I was also diagnosed with Esophageal Lichen Planus and Oral Lichen Planus. ( Esophageal LP is extremely rare. Less than 50 people in the country have this)
There is a common denominator in many patients with LP, it's Hashimoto's Thyroiditis!
FYI.,.. Lichen Planus is also an autoimmune disease.