Smell before the disease.

This amazing story begins with Joy Milne, a young Scottish nurse who smells "musk" or the unusual smell of aromatic wood from her husband Les.

At first, she thought he was just not showering or brushing his teeth, and they both often argued, but after 12 years, Les began to develop a breakdown and was officially diagnosed with Parkinson's disease.

A turning point occurred when Joy took her husband to a meeting with a Parkinson's patient and found that the mysterious smell was in the whole room, so she decided to tell the researchers at the event, "I smell this disease from you."

At first almost no one believed it, leading to a legendary test of sniffing 12 T-shirts, where Joy had to separate six patients' shirts from six normal people.

As a result, she pointed 11 correctly, and the last shirt she guessed was "sick," but the doctor insisted that "normal" was even more shocking...

Because a few months later, the owner of the shirt was diagnosed with Parkinson's disease, as if Joy had not guessed at all, and her nose could recognize the disorder before medical diagnosis.

Scientists began to find the origin of this smell and found that it was hidden in the Sebum, or skin fat, especially in the back and neck, where the chemical composition changed when the body began to develop Parkinson's disease, and that it was a unique smell.

Joy herself has Hyperosmia, making her smell sensitive and finer than the average person.

Currently, the secret from her nose is capped as the idea of developing a "Skin Swab Test," or skin wipe test, to take Sebum for analysis, hoping to help doctors diagnose Parkinson's faster without waiting for patients to experience tremors.

In her 70s, Joy continued to collaborate with researchers to study other "odors of disease" - cancer, tuberculosis, or Alzheimer's - because for her, this talent was not a curse, but an opportunity to save other families from the kind of suffering she experienced.

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According to - BBC News, Parkinson's UK