I have a constant sore throat and acidic feeling after drinking alcohol. What can this be?

Reflux likely. You are having reflux symptoms, not uncommon after alcohol drinking.
Gastritis. Use of alcohol leads to damage of the lining of the stomach, gastritis or ulcers in some who drink. Alcohol is toxic to so many tissues in the body, it is worth reconsidering its use at any level.

Related Questions

What can cause a sore throat after drinking alcohol?

Sore Throat. Hello, this is a difficult question to answer with such limited information. A sore throat can come from a reaction to the alcohol, the alcohol itself could be harsh, or you could possibly have gerd or reflux. Probably a good reason to avoid alcohol and see your doctor for a throat evaluation. Read more...