Could a simple light be the answer to itching?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Participant is an adult at least 18 years-of-age. 2. Participant meets the criteria for acute or chronic itch as defined below: 1. Acute itch lasting less than 6 weeks. 2. Chronic itch lasting more than 6 weeks. 3. Participant is able and willing to comply with all the study visit, treatment, and evaluation schedules and requirements. 4. Participant can understand and provide written informed consent. 5. Participant does not have any concurrent injury or wound in their target treatment area. 6. Participant is either untreated for their pruritus, or if on therapy, must have been maintained on a stable regimen of antipruritic treatments for the past 14 days prior to enrollment. 7. Participant has mild, moderate, or severe pruritus as defined below: 1. Mild: average score \<4 on the PP-NRS during the week before baseline. 2. Moderate: average score 4-7 on the PP-NRS during the week before baseline. 3. Severe: average score of \> 7 on the PP-NRS during the week before baseline. 8. Participants must have comparable pruritus affecting symmetrical or corresponding areas on both sides of their body to allow for the split-body study design. Exclusion Criteria: 1. Participant has any active internal or cutaneous malignancy located within the proposed treatment area. 2. Participant cannot provide informed consent or adhere to study schedule. 3. Participant is actively tanning during the study course. 4. Participant has melasma or another condition exacerbated by heat. 5. Participant is on a photosensitizing medication, such as doxycycline or has a photosensitizing condition. 6. Patient is currently pregnant or breastfeeding. 7. Participant has psychogenic pruritus, a diagnosed skin-picking (excoriation) disorder, or any other current psychiatric condition that, in the investigator's judgment, could interfere with informed consent, adherence to the study protocol, or safe participation. 8. Participant has any condition which, in the Investigator's opinion, would make it unsafe (for the participant or study personnel) to treat the participant as part of this study.