Eczema is a skin condition that causes dry and itchy patches of skin. It’s a common condition that isn’t contagious. Symptoms of eczema can flare up if you contact an irritant or an allergen. There are treatments available to help you manage symptoms, but there isn’t a cure.

Nail psoriasis is an autoimmune disease that causes discoloration, pitting and changes in the structure of your nails. It can make you feel self-conscious, though you can buff your nails and apply nail polish to improve their appearance. Nail psoriasis isn't contagious, and treatments can help your symptoms improve

Melanoma, the most serious type of skin cancer, develops in the cells (melanocytes) that produce melanin — the pigment that gives your skin its color.

A skin condition characterised by dark, velvety patches in body folds and creases.

Acanthosis nigricans typically occurs in people who are obese or have diabetes. More rarely, it can be a warning sign of a cancerous tumour in an internal organ, such as the stomach or liver.

A skin rash caused by contact with a certain substance.

The substance might irritate the skin or trigger an allergic reaction. Some common culprits include soap, cosmetics, fragrances, jewellery and poison ivy.

Hirsuitism is a condition where unwanted male-pattern hair growth occurs on a woman's face, chest and back.

Hirsutism can result from excess male hormones, called androgens. This may occur with certain medical conditions. It may also be inherited.

Cold sores, or fever blisters, are a common viral infection. They are tiny, fluid-filled blisters on and around the lips. These blisters are often grouped together in patches. After the blisters break, a scab forms that can last several days. Cold sores usually heal in 2 to 3 weeks without leaving a scar.

These may result from acne, psoriasis, chickenpox, or various other conditions. Seek medical attention if you have a rash, you think you have an infection, or your lesions resemble those caused by MRSA or cellulitis.

Abnormally excessive sweating involving the extremities, underarms and face, usually unrelated to body temperature or exercise.

A skin condition that causes scaly patches and red skin, mainly on the scalp.

It can also occur on oily areas of the body, such as the face, upper chest and back.