Very few people believe they will fall victim to a serious condition, making it easy to overlook the warning signs.
UK GP Dr Ahmed, (@dra_says) warned three of the most easily missed symptoms can indicate serious illness.
Persistent back pain, a sudden increase in eye floater and unexplained fatigue, are often ignored by patients despite potentially signalling trouble.
Dr Ahmed encouraged viewers to have these symptoms checked by a doctor if they persist or appear suddenly.
Dr Ahmed advised having the symptoms checked if they appear suddenly
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Persistent back pain
Back pain has many different causes and in most cases, these are benign. But despite its commonality, it shouldn't always be ignored.
However, Dr Ahmed stressed that persistent back pain requires attention.
"If you have had pain for more than six weeks, please go and see your doctor to make sure there are no serious underlying causes," he said.
Eye floaters
Dr Ahmed described eye floaters as "squiggly worms" that appear in the eyes, particularly when looking at bright lights.
"Most of the time, it's completely normal and there is no serious underlying cause," he reassured.
However, he warned: "If you've got a sudden increase in the number of floaters or you've got loads of black spots in your vision, then you must get this check out as well."
Extreme fatigue
Dr Ahmed named chronic fatigue as the third warning sign that many people overlook.
He clarified: "I don't just mean feeling a little bit tired all of the time, or if you have a clear reason for feeling tired."
The type of fatigue that is of concern is "extreme fatigue, where you can't function, where there is no obvious reasonable cause, especially if this started relatively recently.
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Seeking medical advice could help identify serious conditions early
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"There could be literally hundreds of reasons for this, and thankfully a lot of them aren't serious."
"I think it's something that a lot of people miss or don't mention because they think it's nothing to worry about."
While these symptoms are common, seeking medical advice could help identify serious conditions early.
Dr Ahmed added: "Sometimes the doctors might even take it seriously, but it's something you must get checked out, just to make sure there's nothing going on."
