It's perfectly normal for your top lip to be bigger than your bottom lip, or vice versa, as lip size and shape are often genetically determined. Having a slightly fuller upper lip is quite common.
Genetics and Natural Variation
- Genetics: The size and shape of your lips are primarily determined by your genes. You likely inherited this feature from your parents or other relatives.
- Natural Asymmetry: Few people have perfectly symmetrical faces. Slight variations in lip size are a common and natural occurrence.
"Heavy Upper Lip"
A "heavy upper lip" is a term used to describe when the upper lip is noticeably fuller than the lower lip. This can be a prominent feature, especially around the Cupid's bow (the double curve of the upper lip).
Other Potential (Less Common) Causes
While genetics is the most common explanation, other factors could (though rarely) contribute to a temporary or perceived difference in lip size:
- Swelling: Minor swelling due to allergies, irritation, or a minor injury could temporarily make one lip appear larger.
- Sun Exposure: Prolonged sun exposure can cause swelling and inflammation, potentially affecting lip size.
- Cosmetic Procedures: Fillers are used to enlarge lips. If you've had fillers, it's possible the filler settled more in one lip.
- Medical Conditions: Very rarely, a medical condition might cause swelling in the face, potentially affecting the lips. If you notice significant swelling or other concerning symptoms, consult a doctor.
Conclusion
In most cases, a top lip being bigger than the bottom lip is simply a normal, genetically determined variation. If you're concerned about a sudden change in lip size, seek medical advice.
