Yes. Alcohol consumption should always be in moderation, because drinking too much will delay the wound healing process.
Excess alcohol use is one of the factors that impede healing, alongside diabetes, poor circulation, nerve damage, infection, immobility, poor nutrition and smoking.
There’s no set definition of “excess” here, and no set limit, number of units, or period of not drinking.
There is one practical reason to raise it with whoever is treating the wound, even if you would rather not. It is important to tell the healthcare professionals managing your wound about any medication you are taking. Alcohol interacts with a number of medicines, and that interaction is part of the same conversation.
A well-balanced diet goes along with this. It is essential for keeping your skin healthy and helping the wound heal.