*3.1.1. Cancer*

Do not use LLLT over any known malignant lesions unless: for pain relief during the terminal stages of the illness, and for cancer therapy side effects (e.g., oral mucositis, radiation derma‐ titis, etc.).

### *3.1.2. Pregnancy*

There is no evidence of harm to an unborn baby; however, there are no safety tests either, so for medico legal reasons it is recommended to not treat directly over the developing fetus.

### *3.1.3. Thyroid*

Although relatively low intensity is far less likely to trigger any adverse events when treating that region of the neck, we suggest not applying lasers directly over the thyroid.
