4 answers
Reckon this could be a symptom of dehydration, mate. It's essential to stay hydrated, especially during the summer or in dry climates. Try drinking more water and applying a good lip balm regularly. Caffeinated drinks and alcohol can also make your lips drier, so better go easy on those!
Given your sudden dry lips, it could be due to dehydration. Make sure you're taking in enough fluids. The atmosphere could also be a contributor if it's particularly dry. Another factor might be the lip products or toothpaste you're using. In case the situation doesn't improve or worsens, it might be advisable to seek medical advice.
Dehydration, most likely. Drink a bunch of water, slap on some chapstick, see how you go.
Lips dry out more frequently than the rest of our skin. The thin skin on our lips lacks oil glands unlike the rest of our skin, hence moisture loss is very common, especially in dry or cold climates. This can also be a sign of dehydration, so make sure to keep yourself hydrated. If it persists, do contact a professional for further advice.