Different occupational diseases and its agents causes are found specified in the established chart showing occupational diseases for the Royal Decree 1299/2006, structured in six large groups:

• Caused by chemical agents.
• Caused by physical agents.
• Caused by biological agents.
• Caused by inhalation of non included substances in the first group of chemists.
• Occupational diseases of the caused skin for other agents.
• Caused by agents carcinogens.

The most frequent occupational diseases are musculoskeletal disorders, caused by repetitive movements or forced postures, included in the group of illnesses caused by physical agents.