The following factors can lead to premature aging of sensitive skin.

1. Altered skin barrier
Sensitive skin is characterized by an altered skin barrier, which increases the permeability of the skin. This alteration leads to higher penetration of substances and water loss, which can make the skin more susceptible to damage and aging.
The skin barrier is crucial in safeguarding the skin against environmental factors, mechanical insults, microorganisms, chemicals, and allergens.

2. Thinning of the stratum corneum
The stratum corneum is the outermost layer of the skin, which plays a crucial role in the formation of the skin barrier.
Sensitive skin is associated with a decrease in the thickness of the stratum corneum, making it more susceptible to irritants that can stimulate inflammatory responses in the body, causing the effects of aging.

3. Dry skin and low fat content
Sensitive skin is often associated with very dry skin with an overall low fat content. Experts say that this dryness can lead to a disturbance of the skin’s protective barrier functioning, making it more vulnerable to damage and aging caused by environmental factors.

4. Aging
Similar changes in the skin barrier are observed in aged people, further indicating how sensitive age can be linked with faster aging. This implies that sensitive skin may be more prone to damage from skin aging.
The skin may lose elasticity, firmness, and hydration due to dehydration and inflammation.

5. Exposure to harsh environmental factors
Sensitive skin can age faster when exposed to harmful environmental factors such as increased UV exposure or harsh chemicals/soaps.
Such factors can trigger sensitive skin, causing inflammation and further dehydration, which can accelerate the aging process.

6. High inflammatory response
Inflammation causes skin aging, and this is supported by the concept of inflammation. This type of inflammation can gradually cause tissue damage and is considered a driving force for many age-related diseases, including skin aging.
Inflammation can cause oxidative stress and damage to cells, leading to the breakdown of collagen and elastin fibers in the skin, resulting in wrinkles, sagging skin, and other signs of aging. 
According to dermatologists, since sensitive skin exhibits increased inflammatory response, it may be linked to faster aging based upon inflammation. Also, as skin ages, it becomes more sensitive to wool, fabrics, detergents, soaps, dyes, and other irritants.