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Check the source before editing
Look at head angle, mouth position and lighting. A tilted head, half smile or shadow may make the two sides look different in that particular photograph. Compare with another clear, relaxed portrait if you have one. Do not assume one image establishes a lasting difference.
Use a front-facing source where both mouth corners and the full lip border are visible. Avoid hair over the mouth, strong gloss highlights or heavy overlining if they hide the edge you want to compare. An editor cannot reliably preserve a boundary that is obscured in the source.
Describe the side unambiguously
“Left lip” can mean your anatomical left or the left side of the displayed image. State which convention you mean. For a text-based edit, “the left side of the displayed photo” is easier to cross-check against the preview than an ambiguous direction.
In the displayed photo, explore a small increase in upper-lip fullness on the left side only. Keep the right side, lower lip, mouth corners, expression, teeth and lip color unchanged.
This example describes a preference, not a recommendation. Change the side and feature to match your own intention. If the plan instead describes increasing both lips, correct it before approving a generation.
Do not turn symmetry into a whole-face makeover
A request for a “perfectly symmetrical face” can invite changes to eyes, nose, chin and expression. It also makes it difficult to judge whether the intended lip adjustment happened. Keep the initial brief limited to one visible area.
Inspect the result beside the source at equal size. Check the selected lip edge first; then examine the opposite side and mouth corners. A shifted smile can create the impression of more even lips while changing the expression you wanted to retain. Preserve natural texture rather than treating smoother skin as a sign of success.
Use a simple accept-or-revise checklist
- Can you point to the intended local change?
- Does the opposite side still resemble the original?
- Are the mouth opening, teeth and smile consistent?
- Did the nose, chin or head angle change unexpectedly?
If the requested difference is unclear, label it insufficient. If the whole mouth has moved, label the comparison unreliable. Do not infer a successful local edit from an attractive overall image. Our comparison checklist explains this distinction.
Compare a preference without choosing a treatment
A photo preview cannot identify a cause, recommend an injection amount or determine whether any intervention is appropriate. It can help you describe a look you are curious about. Keeping the original appearance is also a valid choice.
For a visible fullness example, see our lip virtual try-on walkthrough. For choosing a source, read smiles, lipstick and mouth position. Before creating another version, check credit pricing and the plan shown in the studio.
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By PlastyAI editorial · Published . Written with AI assistance and checked against our photo-preview workflow. Product guidance, not clinical advice; not clinically reviewed. Send a correction.