Her mum, Tam Dover, told Mirror Online her handsome daughter is body conscious, aware that she is different to other children her age.
Emily Dover, from New South Wales in Australia, began to develop breast, body odor and acne at two years old.
Dover added: "It's hard to explain to her what is happening, She knows she's different, she knows she's much bigger than other children".
When Emily gets her period, she describes in the only way a child would, that her 'foo foo is bleeding'.
Emily has been forced to learn how to put "pantyliners on for menstruating" at such a young age, while dealing with strong body odour and cystic acne.
"Something was very wrong with our little girl".
"Because she has trouble toileting, she thought she had done a poo in her undies", Dover said, adding that she hadn't known what was happening to her daughter when she began to spot blood so early.
Emily pictured with her parents.
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"It's shattering that it has impeded so much on her childhood".
Although Emily at seven stone is larger than other children her age and extremely body conscious, she was born a healthy baby and was even the smallest of her siblings weighing 8lbs at birth.
At four months old she was the same size as a 12 month old child, and by two she was displaying signs of puberty.
The youngster endured years of doctors visits who dismissed her height as genetic and symptoms of vomiting and infections as being a result of being in daycare. However, it took two years before docs finally diagnosed her with Addison's disease.
Emily Dover suffers from Addison's Disease, an adrenal gland disorder that affects hormonal development.
Emily, who weighs around seven stone, born flawless "in every way", a happy baby and was also smaller than her older siblings had been at birth, is due to start a course of monthly injections that kick start her body into a very premature menopause, with all its side effects that 50+ year old women have. "We work fulltime each and each time Emily is sick, it is days off, mostly without pay, as we have exhausted all of our leave entitlements".
The couple are hoping to raise money to fund Emily's vital treatment.