Cancer is a vast collection of diseases, and nobody is completely safe from them. Regardless of your age, physical fitness and diet, you can still get cancer, so it's important to know what to look out for.

Redditor u/Wise_Organization_78 put out a call for the symptoms that lead to a cancer diagnosis, and survivors and their family had a lot to say on the subject.

Cancer Survivors of Reddit, what was the symptom that convinced you to see the doctor?
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In fact, there are more than 5,000 comments in this thread, so we went through, and picked out the very best ones to help save you time. Stay safe out there.

Unexplained weight loss is a huge red flag — trouble breathing is an emergency

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Flu-like symptoms aren't always due to a simple virus

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Even if it isn't always cancer, blood in the urine needs a trip to the doctor

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Don't let anybody explain away unusual pain or consistently weird lab results

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Any changes happening to a mole or skin bump need a thorough investigation

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Changes in your voice aren't always harmless

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Being a little tired is normal for many of us, but being exhausted all the time is concerning

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Mild bruising isn't usually a big deal, but major bruises that aren't easily explained raise an eyebrow

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Via u/Wise_Organization_78.

[Image: Thirdman]