Rosacea is a common but poorly understood long-term skin condition that mainly affects the face.

It can be controlled to some degree with long-term treatment, but sometimes the changes in physical appearance can have a significant psychological impact.

The exact cause of rosacea is unknown, although a number of possible factors have been suggested, including abnormalities in the blood vessels of the face and a reaction to microscopic mites commonly found on the face.

Although they’re not thought to be direct causes of the condition, several triggers have been identified that may make rosacea worse.

These include:

• Exposure to sunlight
• Stress
• Strenuous exercise
• Hot or cold weather
• Hot drinks
• Alcohol and caffeine
• Certain foods, such as spicy foods