My daughter is 5 years old and when she was 2 she had 9 root canals. She was diagnosed with an extreme case of lichen sclerosis at the age of 4. They are unsure what causes LS or of the treatment, but some think it is linked with an autoimmune disorder. She weighs 33 pounds. She has not gained anything in the past year and a half but she grew taller, so her pediatrician finally got concerned. She is extremely constipated, she is currently taking laxatives from the GI doctor because they could feel the stools during her exam. My sister was gold standard diagnosed along with her daughter.