This is a single-center, 20-subject, investigator-blinded study to evaluate the effect of Mederma N&I to Mederma Ultra Gel on the appearance of post-surgical scars.

This is a 10-week research study designed to compare the effect of two gels on the appearance of post surgical scarring of the chest and/or back. The subject will be asked to identify two symmetrical skin growths that they would like to have removed: one on the left chest and/or back and one on the right chest and/or back. Additionally, the subject will identify a third skin growth that they would like removed which is a reasonable distance from the two symmetrical skin growths and will be located either on the back or the chest.

Inclusion Criteria:

• Healthy male and non pregnant female subjects ≥18 years of age
• have seborrheic keratoses on the right and left chest and/or back

Exclusion Criteria:

-Subjects with known allergies or sensitivities to ingredients contained in the test product including onion extract and Lidocaine.

Inclusion Criteria:

• Subjects must be 18-70 years of age, of any race or sex.
• Subjects must be Fitzpatrick skin type I-VI.
• Subjects must have two symmetrical upper chest and/or back seborrheic keratoses and in the opinion of the investigator are good candidates for the study.

Exclusion Criteria:

• Subjects with known allergies or sensitivities to ingredients contained in the test product including onion extract and Lidocaine.
• Subjects with known history of keloids or hypertrophic scars.