The vet shouldn't have force fed after only a month and shouldn't have even recommended that in such ma short time. Shed Ease was also unnecessary. Just water would have worked just as good without costing you anything. From the pic I can't tell what is wrong but I would recommend seeking a new vet. Like said above the damage could have even come from the vet force feeding. If you don't have other vet options keep in mind taking a sick pet to an inexperienced vet. Could be more harmful to the animal then no vet at all in some instances. Without proper knowledge/experience they could do or prescribe something that is worse then what ails the animal.

I took a chameleon to a vet that prescribed a pain killer, that causes kidney failure in reptiles, for an injured leg. I found that out when I took it to another vet (who ended up being more experienced) after he developed a respirtory infection instead of getting better. He eventually died of kidney failure.