Can a toothpaste allergy cause itching, burning sensation, and mouth sores?

Hi doctor,

After six months of recovering from the COVID infection, I started feeling itching and burning sensations in my mouth and lips. Sometimes I think that my tongue or lips are swelling. But no one except me sees a swelling. I also have some sores in my mouth. I went to an allergy specialist who made some allergy prick tests, patch tests, and blood tests for 50 allergens. From the prick tests, he said there is a weak reaction to oak and from patch tests on the 72 hours from rye. But the blood tests were all negative. He concluded that I did not have an allergy disease and sent me home. But one month after the tests, I still have the same issues. When I start having the burning, I fear I will have an anaphylaxis reaction. Could it be a reaction to toothpaste or something? Should I be concerned about this happening?

Thanks.

Hello doctor,

Thanks for the reply.

I have had reflux for several years. It was diagnosed with a gastroscopy performed one year ago. I take tablet Famotidine 20 mg of before going to bed; otherwise, I cannot sleep well. I do not snore and do not have nose blocks. The COVID-19 infection was severe, and I had a fever for 30 days, but I was cured at home. After one month of recovery, I did a whole-body scan, and I had perfect results for everything, including a pulmonary test with exhaling in different tubes. I had 10 % lesions in the lungs. But blood tests showed slight variations in vitamin D, ASAT, and LDL cholesterol. They told me all was good and nothing to worry about. I repeated the tests last week, and ASAT came back to normal.

Thanks.

Hello doctor,

Thanks for the reply.

Vitamin D is still low.

What kind of antacid do you prescribe?

Thanks.

Hello doctor,

Thanks for the reply.

Should I stop eating something? Should I be worried about having anaphylaxis? What about toothpaste or oral hygiene?

Thanks.