Cold Symptoms More Condition_symptoms Why Does My Body Break Down Similar To Flu And Cold Symptoms When I Work Too Hard?

Why does my body break down similar to Flu and Cold symptoms when I work too hard? - cold symptoms more condition_symptoms

Hello!

For some reason every time I work hard at my job ... My whole body begins to feel weak and start to get the symptoms of the flu / cold?

My bones I've got a bad cold and fever, runny nose, etc. ..
I am 23 years old.

It could be, asthma, allergies, but usually resolve in a day or night for me to ... But this is no time and it is as if my body breaks down.

What is it? My immune system is too weak?

Please help me. Thank you!