Please choose the correct ending to complete the given sentence: Health: [header] How to diagnose the cause of dry skin [title] Recognize causes of dry skin. [step] In most cases, environmental factors cause dry skin. However, other skin conditions can also cause dry skin.

Ending1: Decreased sun exposure, dry skin, poor hygiene, tattoos, heart disease, pregnancy, and other environmental causes may also cause dry skin. The body's normal protective mechanisms may also cause dry skin. Ending2: The specific cause of dry skin may include taking medications, overworking or travelling or having a major change in your lifestyle recently. These changes in your body may include : [substeps] Humidity. Ending3: If you are afflicted with dry skin, the most common causes of dry skin are low-quality clothing materials, rigorous eating habits, inadequate exercise, excessive drinking, and excessive sweating. [substeps] Consult with your doctor and visit a health provider to get a referral to your doctor. Ending4: Causes of dry skin include : [substeps] Weather, especially when it is cold. Heat from central heating, wood burning stoves, or space heaters.

Answer format: ending1/ending2/ending3/ending4