Sarcoidosis is a disease that happens mainly to people of Scandinavian or African-American descent. In sarcoidosis, groups of inflammatory cells, called granulomas, develop. These granulomas affect different organs; when they affect the lungs, they make it difficult to breathe. Sarcoidosis isn't directly related to Bell's palsy, but some of its symptoms, such as facial paralysis, are similar to Bell's palsy. This is why you may hear your doctor mention sarcoidosis at time of diagnosis.