Gurgling noise from bathroom sink

Hi

Just did a search on this topic.

I have a gurgling problem in a bathroom sink. I have cleaned out the "P Trap" but still have the issue. I noticed when doing this that the pipe (below the P Trap) was heated to get a bend on it when it was being installed by the plumber and is as a result badly kinked could this be causing the problem?

Any help or other suggestions appreciated please.

Thanks

Bedlam

I have similar in a bathroom sink, I clear the gurgling through washing a sink full of hot water down the waste in one go which adds heat and some pressure, that usually clears it, a drain cleaner will also work of course and probably last longer than my diy effort.