Dull ache under the right side ribs for like months.

I am having dull ache under and around my right ribs area. I had the same issue two years back and did blood work, urine test, Ultrasound and finally CT. I was told the tests are clear. CT results showed fatty liver and tiny cyst in liver and I was told by healthcare specialists that it doesn’t require any medication or further medical intervention. Was advised to take long walks and I did. And the pain was gone in a month. And I am having the same pain after 20 months now approximately. No other symptoms. But I felt it started from the flight travel I did like 6 months ago. I used to fly a lot but never been an issue. Please advise.