Recent study revealed that many people are allergic to air oxidized form of the linalool, a fragrance ingredient. Linalool is added in many shampoos, skin conditioners and soaps but it is naturally found in lavender, mint, and other plants.

Researchers found that 5 percent and 7 percent people out of 3,000 study subjects were allergic to that oxidized linalool. Eczema can lead to rashes, swelling, itching and cracking.

Lead researcher, dermatologist Johanna Brared Christensson said: "I would suspect that about 2 percent of the complete population of Sweden are allergic to air oxidized linalool."

Linalool is found in 60-80 percent of the perfumed hygiene products, washing up liquids and household cleaning agents.

Johanna added: "Linalool is present in many products around us, and this is probably the reason that contact allergy to this material is so common."