Who else has the disability to explain something quickly in a verbal manner. It's not that I don't know the answer to the question. I just could not formulate my thoughts to answer the question properly in a verbal manner.
I had that problem when I was young. It was really frustrating. I was a whiz in math, science, geography and all the abstract subjects. I was good at music; I learned songs easily, could pick out melodies on a keyboard and learned the guitar in a few weeks. But I was so infuriatingly inarticulate. I could never find the words I needed. I would stall halfway through a sentence and finally end it with something lame like "... stuff." My dream was to be a cartoonist and I drew my own comic strip, but I could never write the damn dialog! Even in cartoon balloons I could never think of the right word to describe what I knew the character had to say.
Then something magical happened that changed my life. In Arizona in the 1950s in the seventh grade, Spanish was a required course. I was really good at it. I discovered that I love foreign languages and it never occurred to me that this might be a teeny bit inconsistent with my lack of mastery of my native tongue.
The next year, the very next year, I could talk, I could write, I could express myself, I had command of nuances. Suddenly I was as precocious in verbal communication as I had been with the circle of keys and equations in two unknowns.
Each language has its own place in the brain. We know this because people who stutter don't necessarily stutter in a foreign language. Yet they interact with each other, especially when you're a beginner and you're translating all of your sentences in real time. Learning just one year of elementary Spanish established some new neural pathways that streamlined my thinking in English.
The rest is history. You've all seen how I write now. There are times when I make a living at it. I'm just as good at public speaking--and answering the questions afterward. The kid who couldn't conjure up the words "plug" and "socket" when asking how to get power to a radio.
If you're having trouble expressing yourself, I can think of no more promising remedy than to dive into another language and start over. Rewire your brain like I did!