Fans have been concerned about Derick Dillard's health ever since it has been obvious that his looks have changed. Derick appears to have lost some weight, and he did get braces, but the Duggars and Dillards have been quiet about what is going on. Now it is being revealed by Ashley's Reality Roundup that this will be addressed on a future episode of "Counting On."

What will they talk about?

The fans have been worried for about a year, but the have not said a thing to them about what is going on. In a new preview for "Counting On," it was revealed that Derick will be seen going to the doctor.

Derick and Jill are back in Arkansas once again. Derick is seen saying, "It feels great to be home and run like I used to. But it is difficult sometimes." Of course, he doesn't explain the details in the preview of what is going on with him.

Jill Dillard Duggar is seen saying that it makes Derick feel "gaggy." Derick says he is excited to see the doctor. It sounds like he really wants to find out what is going on, but you will have to watch "Counting On" to find out for sure.

It is obvious that Derick Dillard has lot weight and maybe this is the reason why. Everyone can't wait to hear what is actually going on with him. It has been coming for a long time and the fans have wondered if the Duggars would ever address it at all.

Even though "19 Kids and Counting" was canceled by TLC, they brought back the Duggar family with "Counting On." It is supposed to be about the older girls, but you do get to see most of the family on the show, except for Josh. This new season will be their third and will talk about Derick's health, Jessa's second pregnancy and Jinger Duggar preparing for her wedding.

The wedding already happened, but viewers didn't get to see all of the details until now.

What do you think is wrong with Derick Dillard? Are you glad they are finally addressing this on the show? Sound off in the comments section below on your thoughts, and don't miss "Counting On" when it returns to TLC on January 16.