Can lancing a boil hurt?

Of course. Boils or abscesses can be exquisitely painful therefore lancing them can be very sore. Best if you leave it to professionals.
Boil. boils are painful. It is more painful if it is tense because of pressure from the pus inside . usually will need drainage as the antibiotics will not be that effective in treating the pus as they will not act on the dead tissue ( pus).
Boil. The actual procedure of lancing a boil can cause some pain and is often treated with an anesthetic prior to lancing the boil.