“What are the possible complications of local anesthesia?”

Please Google and Wikipedia. There are several local anesthetics, side effects are specific to type.

Overdosing is possible, but not likely. A good surgeon will know the toxic amounts. Adding epinephrine lessens bleeding and toxicity levels are higher, since epinephrine causes vasoconstriction and the local “stays put.” We avoid epinephrine addition on fingertips, etc.

Intravascular injection, infection, inadequate block, and nerve injury are among the most common. However all are exceedingly rare

There are always risks. The doctor will make sure that everything is done before he will do any surgery. If there is a problem, there will be no surgery.

Hello,

As I say a lot here, you should ask the person doing the procedure. First, are you allergic? Second, is there a large volume of local to be used? If it is a simple mole removal, then probably not. The complications are a local infection, which I have never seen in many years of practice. There is pain at the time of injection and that goes away rapidly. Another question to ask the provider is what type of local is being used? They have different lengths of action, and of course where on the body it is being used. The best answer is to ask your provider and they should take the time to answer all of your questions completely.