fatigue<\/a>. This is because your body is doing the very busy work of fighting the infection, leaving less energy for your other usual functions. Therefore, you might find it harder to get out of bed in the morning, you might find yourself with somewhat \u2018brain fog\u2019 as you struggle to concentrate on things or remember what you\u2019re doing, and you might find that your muscles feel achy and sore.<\/p>\n\n\n\nPart of the reason for the latter two symptoms has to do with inflammation. When you are fighting an illness, the body will produce pro-inflammatory cytokines that have the job of triggering inflammation and swelling to kill infections and germs in specific areas around the body.<\/p>\n\n\n\n
Those same cytokines, however, can also cause damage if they affect other parts of the body. They can cause low-level inflammation in the joints for instance and the muscles, hence that feeling of soreness and difficulty moving and doing normal tasks. At the same time, they can cause brain fog if they enter the brain.<\/p>\n\n\n\n
Finally, it\u2019s also worth noting that tiredness can come from the labored breathing. If you struggle to get enough oxygen from your usual inward breaths, then you\u2019re going to feel slower and more tired.<\/p>\n\n\n\n\n\n\n\n