Orange juice and other juices often contain citric acid. But citric acid sometimes irritates your lips.
Too much Vitamin A and B12 can cause chapped or swollen lips. Vitamin A intake should be lower than 25,000 IU / per day. As for Vitamin B12, it contains cobalt and should be minimized.
Each day, drink at least 8 to 10 glasses of water. as it can effectively help chapped lips.
The natural lip oils can prevent dehydration. But smoking can dry up lip oils, causing chapped lips.
Some medications, like acne treatments, may have side-affects, making lips dry or chapped.