Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Achalasia ?
    ### Response:
    What are the signs and symptoms of achalasia? Most people with achalasia experience difficulty swallowing, also known as dysphagia and heartburn. Other symptoms might include: regurgitation or vomiting, noncardiac chest pain, odynophagia (painful swallowing), and pain in the upper central region of the abdomen.
    