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First, there are bulbous glands on each side of the penis. These are normal and they do not go away even after a neuter.
Some discharge is normal after a neuter. You should wipe the end of the penis with a mild baby wipe and remove any discharge.
Keep an eye on it for a couple of days. If you don't see improvement soon, you will want to see the vet to rule out allergies as a cause.
Let me know if you still have questions.