Invisible illnesses are conditions patients have that are not obvious when looking at them. Often people with an invisible illness face a lot of prejudice; others accuse them of faking, lying or exaggerating their illness. People just don’t fully understand what patients with invisible illnesses are going through.

Just because you cannot see a person’s illness doesn’t mean they don’t have one. Just because a person looks OK doesn’t mean that they’re feeling OK. Invisible illnesses often have no cure and patients need to take medication for the rest of their lives to help control and manage the symptoms.

Here are some of the invisible illnesses that could be affecting your friends and colleagues that you wouldn’t know about unless they told you (based on information from bustle.com): 

Bronchiectasis

This chronic lung disease is usually due to either a childhood infection that has compromised the lungs or another serious lung disease like COPD or cystic fibrosis. Scarring of the bronchi (branches in the lungs) makes breathing difficult and often results in a chronic cough, chest pain, wheezing, and shortness of breath.

Read our 10 tips to help you get through cold and flu season.