When I comment on an answer to the question, I need to add an image to show more clearly about my resolving.
How can I add an image to a comment?
You can't add images to comments (in a way that they actually show as images). You can add image links, though. If the image is already on the web somewhere, just post the link to it. If you have the image on your computer, upload the image in an answer field using the image uploader, copy the link to the image from the answer (do not submit the answer) and then paste it into the comment.
You can leave the links bare or hide them behind markdown and show just an image description