Just to spoil your day, there could be a gauze pipe filter within the waterflow somewhere before the actual tap, especially if the tap is a ceramic washer or flip-up type. In that case you need to determine where the filters are and this is probably a job for a real plumber.
Then again..... to brighten your day, if the tap is one of those with a swivel neck like that is usually on the kitchen sink, there is a little screwable cap at the end with some gauzing that collects debris from within the pipes over time. Unscrew/clean/replace. This is not a true filter but makes the water come out of the tap nice and even instead of splurting and splashing all over you.
If it is the tap through wear, the spindle assembly can usually be replaced without replacing the actual tap housing. A lot cheaper and you can do it yourself. Take the worn 'guts' of the tap to the hardware store and try to find someone who actually KNOWS a bit about plumbing.
I don't, so if this is not helpful just ignore it.
Merry Xmas anyway.
btw this is the first time ever I've given an answer that require two posts so feel privileged by all means.