Styes

A stye is a small collection of pus that usually appears like a pimple or boil on the outside or inside of the eyelid. Styes are fairly common, with most people developing at least one during their life.

The most common cause is a bacterial infection, although chronic inflammation along the edge of the eyelid (blepharitis) can also be a factor. Most styes heal without treatment within a few days or weeks. However, applying a warm compress can help to release the pus and aid healing.
Sufferers should run warm water over a clean washcloth, wring it out and place it over the closed eye. Re-wet the cloth when it cools and repeat for five to 10 minutes, several times a day. Warn customers never to try and burst the stye themselves. Customers with styes that persist beyond several weeks should be referred to the pharmacist.

Blepharitis

This occurs as the rims of the eyelids become red and swollen due to inflammation. It is a common condition and accounts for around one in 20 eye problems reported to GPs, according to NHS Choices. Blepharitis can develop at any age, but is more likely to occur in people older than 40. Symptoms include crusty eyelashes, itchy eyelids, and a burning, sore and stinging sensation in the eyes. This may be caused by a bacterial infection or be due to a complication of another skin condition, such as seborrhoeic dermatitis or rosacea.
Blepharitis is not usually serious, but it can be a long-term condition. There is not always a cure, although practising good, daily eye hygiene may help to manage symptoms.