A pH test strip is a strip of litmus paper with which you can measure the pH value of a liquid. … The official pH scale is from 0 to 6, where 0 is very acidic and 6 very alkaline. Some pH test strips can measure a pH from 0 to 6, but there are also pH test strips that can measure only acid or only alkaline substances.

What does a pH test test for?

The pH test for acid reflux (gastroesophageal reflux disease or GERD) measures how often and for how long stomach acid enters the esophagus, and how well it clears the esophagus. Performed with a thin, plastic tube armed with a sensor, it measures the amount of acid backing up into the esophagus.

What are the symptoms of too much acid in your stomach?

• abdominal discomfort, which may be worse on an empty stomach.
• nausea or vomiting.
• bloating.
• heartburn.
• diarrhea.
• decreased appetite.
• unexplained weight loss.