One of the most common causes of dry and chapped lips is dehydration. When your body lacks sufficient water, it affects all parts of your body, including your lips.
While it might seem like licking your lips helps moisturize them, it actually has the opposite effect. Saliva contains digestive enzymes that can further dry out your lips.
Prolonged exposure to the sun's harmful UV rays can lead to darkening and drying of the lips. The skin on your lips is thinner and more sensitive, making it susceptible to sun damage.
Smoking is notorious for causing a range of health issues, and it can also contribute to darkening and drying of lips. The chemicals in tobacco can lead to discoloration and decreased moisture.
Some medications, especially those that cause dry mouth as a side effect, can lead to chapped lips. This includes medications for allergies, high blood pressure, and acne.
Allergies to certain foods, toothpaste, lip balms, or other products that come into contact with your lips can cause them to become irritated, dark, and chapped.
A deficiency in certain vitamins, particularly B vitamins, can lead to dry and discolored lips. Ensuring a balanced diet can help combat this.
Harsh weather conditions, particularly cold and windy environments, can lead to dry and chapped lips. Additionally, indoor heating during the winter months can also contribute to dryness.