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Making the world better, one answer at a time. Thin air is caused by low oxygen pressure at high altitudes. The lack of oxygen makes the air less dense. Thin air is caused by low oxygen pressure at high altitudes. The lack of oxygen makes the air less dense.
The list below shows some of the causes of Thin skin mentioned in various sources: 1  Acrogeria (Gottron Type) - thin skin. 2  Adrenal adenoma, familial - thin skin. 3  Adrenal Cancer - thin skin. 4  Adrenal Cortex Diseases - thin skin. 5  Adrenal Cortex Neoplasms - thin skin. 6  more causes...Â».