<prompt> Answer this question truthfullyWhat causes Achalasia?  <response>: <reason> Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated. Achalasia does not have life-threatening causes.Idiopathic Chagas diseaseGastric carcinoma Herpes zoster HSV-1 Measles virus Paraneoplastic syndrome SarcoidosisAmyloidosis Anderson-Fabry disease Chagas disease Eosinophilic gastroenteritis Esophageal cancer, Gastric carcinoma HSV-1 Idiopathic intestinal pseudo-obstruction Juvenile Sjögrens syndrome Lung carcinoma, Lymphoma, Mediastinal mass Multiple endocrine neoplasia type 2 Myenteric plexus degeneration Neurofibromatosis Paraneoplastic syndrome Sarcoidosis 