5. The constant feeling of weakness.
Constantly feeling weak is never a good thing, although it is true that there are thousand-and-one different things that can cause it. If you feel weak aftershock or exercise, it could be your heart, although it could also refer to your lungs – and you might be having an asthma attack; you could also be having a panic attack. It could also be a lack of nutrients, or it could be a spike (either up or down) in your blood sugar or pressure.
The feeling of weakness can be several different things, but all of them warrant making an appointment with your doctor so that the cause can be tracked down. Make a few lifestyle changes to see if the feeling of weakness gets any better, but if not, it’s best to make another appointment with your doctor – especially if you show several of the symptoms on this list together.