This is Dr. David
yes, a boil on the skin there if it is deep enough can affect the salivary gland.
you may have to see an ENT doctor to get the boil drained and you might need a course of antibiotics.
warm compresses can help as well the boil and the blocked salivary gland.
I would not jump to worries about salivary duct cancers at this point
let me know if you have other questions.
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