The coal tar treatment thread

[D Foster]

Coal tar
Coal tar is a thick, heavy oil and is probably the oldest treatment for psoriasis. How it works is not exactly known, but it can reduce scales, inflammation and itchiness.

It may be used to treat psoriasis affecting the limbs, trunk or scalp if other topical treatments are not effective.

Coal tar can stain clothes and bedding and has a strong smell. It can be used in combination with phototherapy.

Hi Dave,

Great that is the “What” answer.

Now the “Why” 

It's the NHS you are talking about, they don't know what makes things tick at the best of times.