It's not just for sunburn.
Recently, I was in a local health food store, and there was a woman there sampling her company's flavored aloe vera juice. It was touted as being 100% natural, organic, cold pressed aloe vera juice. We bought it. My husband said he overall felt better, but I am so sporadic with taking stuff like that, I can't really give an honest opinion.
I DO know, however, that aloe vera juice is regarded as not only a topical healer, but also a digestive aid and internal healer. It's pretty well known that if you suffer with the BIG C (or constipation), aloe vera juice can help to resolve that. Ironically, if you have diarrhea, it will help with that, too. So I guess it's kind of a cure-all.
It has naturally soothing properties, so if you feel "inflammed", and any of you who suffer with any sort of GI disorders know that feeling, start out with about a tablespoon of pure aloe vera juice. I don't recommend going higher than that on the dosage to start with until you know exactly how your body is going to react to it. Generally, people need somewhere around 1/4 cup, but you know yourself, so gauge it accordingly.
Aloe vera would be appropriate for most GI disorders, providing you don't have an intolerance to it. This would include, but not limited to, colitis, ulcerative colitis, constipation, diarrhea, Crohn's Disease, celiac disease, and ulcers.