How is rosacea diagnosed?
Rosacea is usually diagnosed based on the typical red or blushed facial skin appearance and symptoms of easy facial blushing and flushing. Rosacea is largely under diagnosed and most people with rosacea often do not know they have the skin condition. Many people may not associate their intermittent flushing symptoms with a medical condition. The facial redness in rosacea may be transient and come and go very quickly.
Dermatologists are physicians who are specially trained in the diagnosis of rosacea. Generally no specific tests are required for the diagnosis of rosacea.
In unusual cases, a skin biopsy may be required to help confirm the diagnosis of rosacea. Occasionally, a non-invasive test called a skin scraping may be performed by the dermatologist in the office to help exclude a skin mite infestation by Demodex which can look just like rosacea. A skin culture can help exclude other causes of facial skin bumps like staph infections or herpes infections. Blood tests are not generally required but may be used to help exclude less common causes of facial blushing and flushing including lupus, other autoimmune conditions, and dermatomyositis.
What else could it be?
While most cases of rosacea are fairly straightforward, there are some atypical cases that are not as easy to diagnose. Other conditions and rosacea look-alikes include:
- Acne vulgaris
- Demodex folliculitis
- Staph infection
- Lupus
- Medication reaction (example: niacin)
- Seborrheic dermatitis
- Allergic or contact dermatitis
- Eczema
- Seasonal allergies
- Allergic conjunctivitis
- Perioral dermatitis
- Carcinoid Syndrome
- Impetigo
- Herpes Simplex
What happens to the nose?
The nose is typically one of the first facial areas to be affected in rosacea. It can become red and bumpy and develop noticeable dilated small blood vessels. Left untreated, advanced stages of rosacea can cause a disfiguring nose condition called rhinophyma (ryno-fy-ma), literally growth of the nose, characterized by a bulbous, enlarged red nose and puffy cheeks (like the old comedian W.C. Fields). There may also be thick bumps on the lower half of the nose and the nearby cheek areas. Rhinophyma occurs mainly in men. Severe rhinophyma can require surgical correction and repair.