The goal of this two-phase project is to adapt The-Optimal-Lymph-Flow (TOLF) behavioral intervention to be culturally appropriate, and subsequently test the intervention in Black and Hispanic patients. The investigators have developed and tested behavioral intervention program TOLF that builds patients' self-management skills to promote lymph flow and results in complete pain reduction, reduced lymph fluid level, reversed mild lymphedema, and improved quality of life (QOL). Of concern, this promising intervention has not been adapted to reduce patient barriers (e.g., relevance, cost, time, travel, competing demands) and system barriers (e.g., intervention availability, staffing, therapist) to timely interventions faced by Black and Hispanic women. Specific aims are to:

Aim 1: Engage Black and Hispanic women (N=24) in adapting TOLF to be highly culturally appropriate. The investigators will conduct focus groups to refine TOLF focusing on barriers faced by and preferences of Black and Hispanic women.

Aim 2: Conduct a pilot randomized controlled trial (RCT) (N=60) equally allocating women to either 1) TOLF or 2) lymphedema education (e-Lymph) to examine feasibility, acceptability, and examine primary outcomes (lymphatic pain, pain severity and interference, and lymph fluid level) and secondary outcomes (daily living function, psychological distress, QOL, self-efficacy for pain management) of the culturally appropriate behavioral interventions.

PURPOSE/SPECIFIC AIMS The purpose of this project is to adapt The-Optimal-Lymph-Flow (TOLF) behavioral intervention to be culturally appropriate, and subsequently test the intervention in Black and Hispanic patients. The investigators have developed and tested behavioral intervention program TOLF that builds patients' self-management skills to promote lymph flow and results in complete pain reduction, reduced lymph fluid level, reversed mild lymphedema, and improved quality of life (QOL). Of concern, this promising intervention has not been adapted to reduce patient barriers (e.g., relevance, cost, time, travel, competing demands) and system barriers (e.g., intervention availability, staffing, therapist) to timely interventions faced by Black and Hispanic women. Specific aims are to:

Aim 1: Engage Black and Hispanic women (N=24) in adapting TOLF to be highly culturally appropriate. The investigators will conduct focus groups to refine TOLF focusing on barriers faced by and preferences of Black and Hispanic women.

Aim 2: Conduct a pilot randomized controlled trial (RCT) (N=60) equally allocating women to either 1) TOLF or 2) lymphedema education (e-Lymph) to examine feasibility, acceptability, and examine primary outcomes (lymphatic pain, pain severity and interference, and lymph fluid level) and secondary outcomes (daily living function, psychological distress, QOL, self-efficacy for pain management) of the culturally appropriate behavioral interventions.

RATIONALE/SIGNIFICANCE OF THE STUDY. Lymphatic pain refers to pain, aching or soreness in the ipsilateral body or upper limb following breast cancer treatment. More than half of the 3.8 million women with breast cancer suffer lymphatic pain which leads to impaired daily living function, psychological distress, and compromised QOL. Most importantly, lymphatic pain is significantly associated with lymphedema, a chronic and incurable condition caused by an abnormal accumulation of lymph fluid. Black and Hispanic women are three times as likely to suffer from lymphedema compared to White women. Timely intervention for lymphatic pain can decrease the risk and severity of lymphedema. However, there are persistent barriers to timely interventions faced by Black and Hispanic women with breast cancer - a group at high risk for developing lymphedema, pain, and other negative breast cancer related outcomes.

THEORETICAL FRAMEWORK. Self-efficacy theory guides the project. Behavioral pain interventions focus on training patients on self-management skills to be implemented in their daily lives.

MAIN RESEARCH VARIABLES. Behavioral pain intervention (IV), Outcomes (DVs): lymphatic pain, pain severity and interference, lymph fluid level, daily living function, psychological distress, QOL, self-efficacy for pain management.

DESIGN. Qualitative and randomized clinical trial (RCT)

SETTING. All participants will be recruited from UMKC University Health and surrounding communities.

SAMPLES. Black and Hispanic women with lymphatic pain

METHODS. Focus groups will be conducted with Black and Hispanic women to gather data that will lead to culturally appropriate adaptation of TOLF. Then, a pilot RCT will be used to examine feasibility, acceptability, and evidence of future efficacy of this culturally adapted intervention.

IMPLICATIONS FOR PRACTICE. The successful completion of the project will advance health equity in pain and lymphedema by making this culturally appropriate, highly accessible, and effective behavioral intervention available to Black and Hispanic women.

Inclusion Criteria:

• The participants are Black and Hispanic women (over age 18) with lymphatic pain following breast cancer treatment. These women will be recruited for the Phase I focus groups (N=24), and the Phase II RCT (N=60). Participants will include women who 1) have received surgical treatment for breast cancer at least 3 months prior to the study enrollment, 2) report persistent or intermittent pain/aching/soreness in the ipsilateral body or upper limb; 3) self-identify as either Black or Hispanic; and 4) are able to understand the study protocols presented in English.

Exclusion Criteria:

• Exclusion criteria include: 1) presence of a serious psychiatric condition (e.g., schizophrenia, suicidal intent) indicated by medical chart, treating oncologist or other staff, or study staff interactions that would contraindicate safe study participation; 2) known metastatic disease (Stage IV), recurrence of cancer, or lymphedema due to cancer recurrence, or other bulk disease in the thoracic or cervical regions; 3) were diagnosed or treated for lymphedema.

We will not share any individual participant data during and after study.

Participants will only know that they will be assigned to one of the two comparable behavioral and educational programs and they will not know which program is the intervention. Outcome assessors will not know the participants' assigned program throughout the study.