Premature aging and wrinkling of the skin can result from a combination of intrinsic and extrinsic factors. Some common causes:

1. Ultraviolet (UV) Exposure: Prolonged and unprotected exposure to the sun's harmful UV rays is one of the primary causes of premature aging. UV rays can break down collagen and elastin fibers in the skin, leading to sagging and wrinkles.
2. Smoking: Smoking tobacco is a major contributor to premature skin aging. It narrows blood vessels in the skin, reducing blood flow and oxygen supply. 
3. Poor Diet: A diet lacking in essential nutrients and antioxidants can accelerate skin aging. A diet high in processed foods, sugar, and unhealthy fats can contribute to inflammation and oxidative stress, which can damage the skin.
4. Dehydration: Chronic dehydration can make the skin lose its elasticity, leading to the development of wrinkles and fine lines. Proper hydration is essential for maintaining youthful-looking skin.
5. Lack of Sleep: Inadequate sleep can lead to skin problems, including premature aging. During deep sleep, the body repairs and rejuvenates the skin. Chronic sleep deprivation can disrupt this process.
6. Stress: Chronic stress can release hormones like cortisol, which can break down collagen and elastin fibers in the skin. It can also lead to behaviors like frowning or furrowing the brow, which can cause wrinkles over time.
7. Alcohol Consumption: Excessive alcohol consumption can dehydrate the skin and deprive it of essential nutrients, leading to premature aging.
8. Air Pollution: Exposure to environmental pollutants, including smog and cigarette smoke, can generate free radicals in the skin, which can accelerate the aging process.
9. Genetics: Your genetic makeup plays a role in how your skin ages. Some people are genetically predisposed to develop wrinkles and age spots earlier than others.
10. Repeated Facial Expressions: Repeated facial expressions like squinting, frowning, or smiling can lead to the formation of dynamic wrinkles, especially in areas where the skin is thin.
11. Lack of Skincare: Neglecting a proper skincare routine, including cleansing, moisturizing, and using sunscreen, can contribute to premature skin aging.
12. Hormonal Changes: Hormonal fluctuations, such as those that occur during menopause, can affect the skin's collagen production and elasticity, leading to wrinkles. I strongly advise considering bioidentical hormone replacement - ask a doctor who prescribes this.
13. Medications: Some medications, such as corticosteroids and certain antibiotics, can make the skin more susceptible to damage and premature aging.

To slow down the aging process and reduce the risk of premature wrinkles, it's essential to protect your skin from UV rays, maintain a healthy lifestyle, stay hydrated, and follow a skincare routine that suits your skin type. Consulting a dermatologist can provide personalized recommendations for anti-aging treatments and skincare products.