Related Experiment Video

Updated: Jan 26, 2026

Enucleation of the Prostate for the Treatment of Benign Prostatic Hyperplasia Using a 980 nm Diode Laser

Enucleation of the Prostate for the Treatment of Benign Prostatic Hyperplasia Using a 980 nm Diode Laser

Published on: May 5, 2020

Q-switched double-frequency Nd:YAG (532 nm) laser is an effective treatment for racial lip pigmentation

Mana Abdullah Alharbi¹

¹Department of Dermatology, Imam Muhammad ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia.

Journal of Cosmetic Dermatology

|April 10, 2019

Abstract

Introduction:

Lip darkening is a relatively common condition, especially in the Middle East and Southeast Asia. It is well documented in the literature and generally considered to be multifactorial. The presentation can be physiologic or pathologic and caused by a variety of local or systemic factors.

Case Presentation:

A 32-year-old female with skin type IV presented to the clinic with concerns of darkening lips with no associated symptoms or history of disease. On examination, her lips were homogenously dark brown with the upper lip slightly darker than the lower lip.

Objective:

To report effectivness of Q-switched 532 nm laser for treatment of lip pigmentation.

Method:

Topical 2.5% lidocaine/prilocaine (EMLA) cream was applied 30 minutes prior to laser therapy. The region was treated with Q-switched 532 nm laser (Medlite).

Result:

Two weeks after laser treatment , threre was satisfying subjective and objective improvment in lip pigmnetation.

Conclusion:

Q-Switched 532 nm laser effectively reduces lip pigmentation after one session with minimal adverse effects and lasting results.

Keywords:

Q-switched frequency-doubled Nd:YAG laser lip hyperpigmentation oral hyperpigmentation

More Related Videos

Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application

Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application

Published on: September 27, 2024

Endoscopy Guided Photoablation of Endometrial Cysts using a 980 nm Laser with a Contact Fiber in Mares

Endoscopy Guided Photoablation of Endometrial Cysts using a 980 nm Laser with a Contact Fiber in Mares

Published on: July 16, 2020

Related Concept Videos

Switching of BJT

Switching of BJT

Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...

Pigmentation

Pigmentation

The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...

Frequency-dependent Selection

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.

Fixing Double-strand Breaks

Fixing Double-strand Breaks

The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...

What is a Frequency Distribution

What is a Frequency Distribution

A frequency is the number of times a value of the data occurs. The sum of all the frequency values represents the total number of students included in the sample. It is commonly used to group data of quantitative types. Frequency distributions can be displayed in a table, histogram, line graph, dot plot, or pie chart, just to name a few. A histogram is a graphical representation of tabulated frequencies, shown as adjacent rectangles, erected over discrete intervals (bins), with an area equal to...

Mean From a Frequency Distribution

Mean From a Frequency Distribution

Sometimes, data gathered from an experiment on a large sample or population are organized into concise tables. In such cases, the frequency of the quantitative data set is plotted in the form of a table. Or else, the data values are grouped into the quantity’s intervals, which form classes, and their respective frequencies are known. That is, the data values are distributed over different categories or classes. This is known as frequency distribution.
When such a data set is encountered,...

Articles linked to this work by shared authors, journal, and citation graph.

1927 nm Thulium Laser Successfully Treats PostInflammatory Hyperpigmentation in Skin of Color.

Dermatology research and practice·2021

Identifying Patients at Higher Risk of Depression Among Patients with Vitiligo at Outpatient Setting.

Materia socio-medica·2020

See all related articles