5. Bathroom plans

Dihareea is a problem that prevents us from doing a lot of activities. Even if this issue is normal from time to time, or after eating the “wrong thing”, if it keeps up for 3–4 weeks, it might be an indicator of a weak immune system.

The opposite, constipation, might also be a not-so-good sign. The digestive system works properly when a healthy immune system is there to support it. When a virus or bacteria attacks our digestive system, it will not defend itself properly if the immune system is not capable of helping.

Besides that, the digestive system is the home of trillions of good bacteria, also known as gut flora. These bad bacteria play a key role in defending the immune system and the digestive system from diseases. Maintaining a healthy lifestyle, a good diet, and an active life will eventually prevail when it comes to a weak immune system.