Pain and Burning sensation

[M800]

Hi there,

My problem started 3 days back.
Normally, I rinse my penis (both before and after retracting foreskin) with water and diluted dettol each day. However, 3 days back I did the same but with undiluted dettol. That night I had a burning feeling, and now after 3 days even though the burning feeling has reduced, I find the following changes:
1. The foreskin has been thick and curled in folds inside. Retracting the foreskin even in flaccid is painful and almost impossible now. Previously it could be done but not while erect (probably I have phimosis)
2. Pain while touching the tip of the foreskin and glans underneath, however there is no pain in the shaft.
3. Can't mention if the colour or the natural moistness of the glans is same or not since can't retract the foreskin, however it has been normal before this event.
4. While peeing, there is an itching and burning feeling
5. Attaining erection is also painful

I read somewhere that using warm water with salt is beneficial (however the amount to be used is not sure), therefore I do this whenever it pains or burns and it helps.

What could have gone wrong and how this can be cured? Will it be natural healing or some immediate step has to be taken? Please any advice.