According to the NHS website, symptoms may not appear until up to eight weeks after initial infection, as the body requires ...

The comedian had been given the all clear previously, but has announced that her skin cancer returned in a mole on her arm.

In areas where patches continue to reappear, the skin can get rough and scaly. These rough patches can also be itchy. Lichen planus can’t be cured, so treatments focus on managing symptoms.

Today, Dr Zoe helps a reader who has been suffering from an itchy flaky scalp for over a year ... but with inflammation of the under-lying skin. This inflammation is what causes the itchiness.