How a Skin Specialist Diagnoses Common Skin Conditions

What Happens During a Skin Specialist Consultation?

A consultation usually follows a structured process, where your doctor gathers the information needed for an accurate diagnosis. While the exact approach depends on your symptoms, you can generally expect the following steps.

Which Common Skin Conditions Can Often Be Diagnosed Clinically?

For many patients, the information gathered during the consultation is enough for a skin specialist to make a clinical diagnosis. Some skin conditions have distinctive features that can often be recognised without additional investigations, including:

• Acne

  Acne is typically identified by the presence of blackheads, whiteheads, papules, pustules or cysts in areas with a high concentration of oil glands, such as the face, chest and back. The severity and distribution of these lesions also help distinguish acne from other inflammatory skin conditions.

• Eczema

  Eczema is often recognised by dry, itchy and inflamed patches of skin that occur in characteristic locations depending on a person's age. Your skin specialist also considers whether symptoms are recurrent and whether there is a personal or family history of allergic conditions.

• Psoriasis

  Psoriasis commonly presents as well-defined, thickened red plaques covered with silvery scales. The appearance, distribution and symmetry of these plaques, particularly on the elbows, knees and scalp, often provide strong diagnostic clues.

• Rosacea

  Rosacea is usually diagnosed based on persistent facial redness, visible blood vessels and episodes of flushing. Some patients may also develop acne-like bumps, which a skin specialist can distinguish from acne by evaluating the overall pattern of symptoms.

• Warts

  Warts are generally identified by their characteristic rough, raised surface and typical locations on the hands, feet or other areas of the body. A close examination usually allows them to be differentiated from corns, calluses and other benign skin lesions.

• Benign Skin Growths

  Common benign skin growths, such as skin tags, often have distinctive appearances that allow them to be recognised during a clinical examination.

When Might a Skin Specialist Recommend Further Investigation?

Additional investigations are not required for every patient, but they may be recommended when a diagnosis remains uncertain or further information is needed. This is more likely when symptoms have an unusual presentation, overlap with other skin conditions or raise concern for a more serious underlying cause.

Your skin specialist may recommend further testing in situations such as the following:

• A changing or suspicious mole: Changes in size, shape, colour or border, or a mole that bleeds or crusts, may require closer assessment. These changes can be a potential sign of skin cancer, making further investigation worthwhile.
• A persistent or unusual rash: Symptoms that do not improve, recur frequently or have an atypical appearance may need further investigation.
• Recurrent skin infections: Repeated bacterial, fungal or viral infections may indicate an underlying skin or medical condition, potentially making skin infection treatment necessary.
• Hair loss with multiple possible causes: Additional investigations may help distinguish between genetic, autoimmune, hormonal or nutritional causes.
• Unexplained nail changes: Thickening, discolouration or changes in nail growth may require further assessment to determine the underlying cause.

Depending on the suspected condition, your skin specialist may recommend one or more diagnostic tests to gather additional information or confirm the diagnosis.

What Tests Can a Skin Specialist Clinic Use to Confirm a Diagnosis?

The diagnostic tests recommended will depend on your symptoms and your skin specialist's clinical assessment. While not every patient requires additional investigations, the following tests are commonly used to gather more information or confirm a suspected diagnosis.