건성 (Dryness) refers to a condition where there is a lack of moisture in the skin, air, or other surfaces. This can lead to discomfort, irritation, and a rough texture. Common causes of dryness include low humidity, cold weather, and certain skin conditions like 아토피 피부염 (atopic dermatitis). In addition to affecting the skin, dryness can also occur in the eyes, throat, and nasal passages. Symptoms may include itching, flaking, and cracking. To alleviate dryness, it is important to stay hydrated, use moisturizers, and maintain a balanced environment with adequate humidity.