Q I was surprised last week when my GP suggested I switch from smoking cigarettes to e-cigarettes. I expected him to tell me to quit. Should he be recommending vaping?

I’m pleased your GP had this discussion with you. E-cigarettes were a tricky issue for doctors: They came into the UK in 2004 and their popularity grew exponentially through marketing and as a commercial interest, far removed from any health or pharmaceutical product. More than 2.5 million people now use them in the UK.

The medical profession has really had to play catch up in terms of recommending them as a quit aid and understanding their harms. Last year, the Royal College of Physicians published its evidence on the use of e-cigarettes and the results speak for themselves: If there are health risks from using e-cigarettes, there will be fewer than five percent of those smoking tobacco.

That is a huge improvement for a smoker, so doctors now feel able to recommend them as a quit aid. Incidentally, they are not completely harm-free; doctors would not recommend them as a habit to a non-smoker, only as an alternative for smokers.

The health risks from smoking in the main come from the tobacco, so if that is removed, most of the danger is also removed. This is why nicotine replacement products, such as patches and gum, are safe. In 2014 to 2015, two-thirds of people who combined use of an e-cigarette with a smoking support service to quit smoking successfully gave up the habit.

Q My child’s school has had an outbreak of scarlet fever. I thought that illness vanished in Victorian times. What do I need to know?

Dr Ellie Cannon

Dr Ellie Cannon

We still see a lot of scarlet fever and there have been outbreaks recently all over England.

Last winter there were 12,906 cases in the UK, a rise of well over 5,000 from the year before. We are not sure why there has been such an increase recently but, as long as parents are aware, there is no cause for alarm.

Scarlet fever is a bacterial throat infection that also causes a fever, a sore throat and a red, papery-feeling rash.

The rash starts spotty, then spreads and becomes redder with facial flushing, resulting in a miserable, unwell child who looks very flushed. It spreads easily round schools because the bacteria can be passed on in coughs and sneezes.

The usual age group for children to be affected is from two to eight, but the illness can affect anyone.

The diagnosis needs to be made by a doctor on the basis of the rash, in combination with the throat infection and other signs, such as swollen glands.

Children can also get something called a strawberry tongue, where the tongue looks red and swollen like a strawberry.

Nowadays, thanks to penicillin, we don’t see severe cases of scarlet fever.

Once treatment with penicillin starts, the illness quickly resolves.

It is very contagious, so children need to be isolated and kept off school until their fever has gone and the antibiotics have kicked in.

Q I have a skin mole that looks as if it may have changed over the past few months. How do I know whether to see a doctor or not?

Generally speaking, if you are worried about a change, it is usually worth getting the reassurance from a medical examination.

I find the best way for individuals to keep an eye on their own moles is to take a photo of them on your phone, so you can refer back if you think any have changed – we do that in clinic and it is a great way to be sure.

Essentially, most moles are harmless; what you need to watch out for are unusual ones that don’t look like the others – what I have heard dermatologists call ‘ugly ducklings’, or ones that are changing.

Looking for changes specifically means keeping an eye out for ones that are asymmetrical in shape or have a very jagged border – not the nice round ones.

Irregular colour across the mole is also a warning, as is a change in the way it feels: itching, rough or bleeding, for example.

Growing in size is important, particularly if it is more than 7mm.

Do not be alarmed, as normal moles do change very gradually over years, but more noticeable changes as described should be checked out promptly.

A cancerous mole, or melanoma, is the least common but most serious form of skin cancer, and the earlier it is detected and treated, the better the outcome.