The skin of your chest feel a slight pain like a sunburn but have not been in the sun but moves to the left side of body?

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This is a question you should discuss with your doctor, as the possible causes range from just irritating to quite serious.

Insect bites, other arthropod bites, contact with certain plants or chemicals - these can all cause localised skin irritation. Vitamin deficiencies can result in nerve irritation, but this is usually not localised to one area. Various viral infections can affect the nerves, and some fungal infections can affect the skin and possibly alter sensation.

The nerve supply to the skin of the chest comes from spinal nerves that exit the spinal column below each vertebra. They supply the skin in stripes or bands known as dermatomes. Each side is supplied separately.

This means that damage to a nerve or to the spine can result in sensations on the skin. This may occur with or without muscular involvement, depending on the type of damage.

Zoster sine herpeticum is a form of shingles where there is no visible rash. Shingles is caused by the same virus as chicken pox, which becomes dormant in the nerve ganglia and may reactivate later in life during times of stress, illness, or due to various causes of decreased immunity (including HIV infection.) Usually it affects one dermatome on one side of the body, and there is usually a rash made up of blisters. It is very painful. In the early stages, it can be felt as an itch, and the rash may only develop later. It could be a sign of more serious problems, and it can be infectious and give other people the virus.

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