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8 potentially deadly conditions that may not show obvious symptoms at first

INSIDER Logo By Caroline Praderio of INSIDER | Slide 1 of 9:  Some health conditions produce symptoms you can't ignore. Kidney stones are legendarily painful. The flu makes you feverish and achy. Skin issues like eczema and acne cause changes you can see. But other conditions can be serious - sometimes deadly - without causing obvious symptoms, especially in their early stages. Some have even earned the chilling nickname "silent killer."  Here's a closer look at eight conditions that don't always have noticeable signs.

Some health conditions produce symptoms you can't ignore. Kidney stones are legendarily painful. The flu makes you feverish and achy. Skin issues like eczema and acne cause changes you can see.

But other conditions can be serious - sometimes deadly - without causing obvious symptoms, especially in their early stages. Some have even earned the chilling nickname "silent killer."

Click through the slideshow above for a closer look at eight conditions that don't always have noticeable signs.

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