The cause of a rash can most times be determined by the appearance of the rash itself, according to The New York Times." A rash is usually characterised by redness of the skin, generally blotchy, that can sometimes itch. Rashes on the face are common and most rashes are some form of dermatitis.
Dermatitis can appear as an itchy or scaly rash. Dermatitis can be found on the face or any other part of the body that an irritant touches. Irritants that cause dermatitis include latex, soaps, make-up, chemicals and poison ivy. Another from of dermatitis is seborrheic dermatitis, which can be found on the eyelids, mouth, nose, behind the ears and eyebrows. When this type of dermatitis is found on the scalp it is called dandruff. Eczema is a rash that is related to dermatitis. It is a red, itchy, scaly rash that is usually suffered by people with allergies or asthma.
This rash often appears on the scalp, but it can be found along the outside of the scalp. Psoriasis is also a scaly, itchy condition. It is notably found in patches that are silvery-white in appearance. According to the National Psoriasis Foundation, this is an autoimmune disease that is suffered chronically.
Chickenpox is generally a childhood illness, but adults can suffer from it too. These small red dots are rashes that itch and can be painful. They appear on the face and on other parts of the body as well.
Rosacea is a common disorder that causes red, inflamed rash on the nose and cheeks. According to Rosacea.org the cause of Rosacea is unknown and the disorder is not curable. Rosacea can appear as pimples or visible blood vessels on the face.
Lupus is an autoimmune disease that has many more symptoms than just a facial rash, but the facial rash is well documented. According to "The New York Times," this disease can be identified by a "butterfly" rash over the cheeks and the bridge of the nose. This symptom affects over 50% of those with this immune disorder. The rash can get worse in sunlight.