This study aims to see if people's health related quality of life (how they feel about their health) changes over a 12 week period if they do not receive any change in their medicines. The investigators would like people to complete four questionnaires then repeat them after three months. The investigators need to do this to in order see what difference they should expect to detect if they give people treatment that works.

Study Design This will be a questionnaire study, which will involve administering questionnaires to patients with sarcoidosis at baseline and after six and 12 weeks.

Participants can either complete the questionnaires whilst they are attending clinic, or alternatively return the questionnaires via a pre-paid postal envelope. The questionnaires will be administered at the same time; no other study measures will be taken subsequently. Demographic and clinical information will be collected from the patients' medical records.

Inclusion Criteria:

• Male or Female aged over 18
• Diagnosed with sarcoidosis by either; biopsy confirming non-caseating granulomas consistent with sarcoidosis, or multi-disciplinary interstitial lung disease meeting diagnosis of sarcoidosis
• Significant fatigue - defined as a FAS score of greater than 21 points
• Has mental capacity to complete the questionnaires

Exclusion Criteria:

• Presence of another significant cardio-respiratory disease, major organ disease (except where related to sarcoidosis) or chronic inflammatory condition

People with sarcoidosis and fatigue