Skin rash describes any kind of atypical discoloration or distortion of skin tissue in a human or animal. It is one of the most frequently reported symptoms in the medical world and is associated with hundreds of different medical conditions. There are many types of skin rashes, so attempting to diagnose the underlying condition requires an examination of the symptoms.

Since the potential causes of skin rash are so numerous, it's easier to break them down into a few basic categories. Superficial or transient rashes are those that are only present for a short time and do not arise alongside any other symptoms. They can arise from virtually any kind of negative stimulation, including exposure to scratchy fabrics or chemical residue.

In humans and animals, the skin is the primary line of defense against microscopic invaders. However, even though it does well protecting the internal organs, the skin itself can easily become a victim of infection. Serious skin rashes can indicate skin disease, which can spread or become more serious without treatment. Aside from infections, various types of benign and malignant cancers also cause rashes to appear on patients.

Skin rashes that arise from internal causes are usually more serious because they can indicate an underlying health problem with far-reach implications. Infection by certain pathogens, like Lyme disease, can produce a characteristic and telling rash that is often the only visible symptom. The possibility of an underlying condition is why you should treat skin rashes seriously even if they don't hurt or itch.

Inflammation leading to a skin rash can also result from allergic reactions and chronic diseases. Known toxins, like those found on the poison ivy plant or from an insect bite, can trigger allergic reactions in anyone. There are also many chronic diseases, including hormone and immune system imbalances, that can also produce visible irritation of the skin.

Adult humans can be generally expected to notice and report their own skin rashes, but this doesn't work with children or pets. Parents and pet owners should be on the alert for skin rashes in their human and furry family members. In animals, hair loss, excessive itching, anxiety, and loss of appetite may accompany chronic skin problems.

The treatment for a skin rash depends entirely on context. You should always seek a professional medical opinion when possible. If the rash is still new or in the early stages, then you should keep a careful eye on it and note any developments or changes. Keeping a log of the location, type, and sensations of the rash could eventually provide your doctor with valuable information to aid in diagnosis.