The most commonly observed symptoms in patients diagnosed with achalasia include:

* Dysphagia (Difficulty Swallowing): This is the most prominent and distressing symptom of the condition. Patients experience a sensation of difficulty when swallowing solid and liquid foods.
* Regurgitation: A sensation of food getting stuck in the esophagus or the return of undigested food and liquids to the mouth. It typically occurs shortly after meals or when lying down.
* Chest Pain: Retrosternal pain (behind the breastbone) felt especially during or after swallowing.
* Weight Loss: Occurs due to difficulty swallowing and inadequate nutrition. In children, it can lead to developmental delay.
* Cough and Recurrent Lung Infections: May develop as a result of aspirated gastric contents or food entering the windpipe.
* Sensation of a Foreign Body in the Esophagus: A feeling of something being stuck in the esophagus, particularly without a history of unusual swallowing, should raise suspicion for achalasia.