The skin is the largest organ of the integumentary system and plays a vital role in temperature regulation and insulation, among other things. And another thing that's fascinating about the skin is just how many common skin conditions exist, and below are a few of them, and what could be causing them.

Perhaps one of the most common skin conditions is acne, which usually happens when a pore becomes blocked with dead skin cells and oil. This is a painful condition that is often triggered by either hormones or bacteria, and according to WebMD, is commonly found on the face, neck, back and chest areas.

Rosacea can at times be misdiagnosed by an individual as being acne and can have a similar appearance, with thick red bumps and pus-filled pimples. According to Healthline, this is a chronic skin disease, which can go through phases and at times can clear, only to reappear by triggers such as stress, alcohol, spicy food, and the intestinal bacteria, Helicobacter pylori.

Age spots, as the name suggests, are dark spots that appear on the skin which tend to be more common in older people. However, according to WebMD, it is not caused by aging and rather the exposure to sunlight.

Warts are often associated with witches and other unpleasant things, but common warts are exceedingly, for lack of a better word, common. Although they can appear anywhere, they are often found on the hands and feet. They are caused by the human papillomavirus, and the worst part is this virus is highly contagious, so the infection can be spread when touching something that has been used by a person with the virus.

According to the NHS, while most warts are harmless and clear up without needing treatment, others require cryotherapy and chemical treatments that can be carried out by a doctor.

Psoriasis is indicated by the presence of red patches of skin often covered in dry flakes that look like scales. The condition, according to WebMD, happens when the body causes new skin cells to grow too quickly. Yet despite knowing the reason psoriasis happens, doctors are not aware of what causes it.

The condition is commonly found on elbows, the lower back, and knees, and according to NHS, it can be itchy and even painful in some people.

Eczema, also called atopic dermatitis, is another condition that can be defined by flaky, inflamed skin, and according to Healthline, the affected areas can be red, itchy and dry. Although the condition is more common in children and infants, it can affect people of all ages and it is caused by a reaction to proteins or an overactive immune system which “that responds aggressively when exposed to irritants.”

Skin tags are strange pieces of flesh hanging from your skin, and they can either be flesh-colored or slightly darker. According to WebMD, skin tags can be found in various places in the body, and although they pose no risk to the individual and are seldom painful, they are unpleasant and can affect an individual’s self-confidence.

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