ehhh ... I don't believe anything they say about Aloe Vera. I've used it for sunburn before, and it really didn't make anyf difference vs non aloe vera stuff.
What should help the most is a topical steroid such as Hydrocortisone.
It should reduce swelling and pain.
Oral Acetaminophen, Ibuprofen, Naproxen, or Aspirin should also help dull any pain.
Unlike Aloe Vera, everything I have mentioned is regulated by the FDA.