I don’t regret my attempts to get answers. I had other symptoms appear around the same time as the bitter taste appeared. And, it was right after covid. But…..it’s not certain. I was diagnosed by the second neurologist with Vitamin B12 deficiency. I went on mega doses by injection, then sublingual. (I don’t absorb it well.). I also had paresthesia in hands and feet, hair loss, fasciculations throughout my body, internal vibrations and sleep disturbance, So….it seemed like a lot going on. I had emg, brain MRI, blood tests, etc.

The ENT looked at everything and diagnosed post covid as cause. I took the smell tests twice. I learned smell and taste are related. Initially, I didn’t realize I had smell disorder, but when I began the smell test I was shocked that I could barely recognize any of the samples! I failed it miserably. It then made sense why I had easily lost so much weight. I was trying to lose, but had an easy time.

At the same time, I had a recurring, intermittent phantom smell. This frightened me since it can be due to brain disorder. It was a pleasant smell similar to fabric softener. It hit randomly. Thankfully, it faded away and I no longer have it!

My other symptoms have improved too, though I still have some symptoms. I could get hardly any information from any if the doctors about the odd taste. It hit suddenly after I took an antibiotic and antifungal med. Coincidence? Idk.

I would keep up hope. I have to believe it will recover. A second smell test months after the first one confirmed my smell had returned.

Please post your progress. I sure hope yours improves.