Brad P.
Large wound after collection
The first kit I received arrived quickly... but did not work. I had to wait a week for a new kit to arrive. That kit did work. However it left a large wound in regards to blood sample collect in on my arm. Subjectivity, it was the size of 12g need. But had the appearance of a 1/4" cut. I can't bring myself to use this method for long term.
Response from Rythm HealthMar 15, 2026
Thank you for sharing this feedback, Brad. I’m really sorry you had this experience with your first kit and the cut on your arm. To clarify, the device uses a retractable lancet, which creates a small surface-level cut that typically heals within about a week with proper care. Some people’s skin can be more prone to visible marks or scarring, especially in areas with thinner skin or more tension. For anyone who notices a more noticeable mark, we generally recommend keeping the area clean, applying a gentle, fragrance-free moisturizer or healing ointment once it’s closed, and protecting it from sun exposure (or using sunscreen) to help reduce long-term discoloration. We understand your hesitation about using this method long term and really appreciate you giving it a try and letting us know what happened. If you’re open to it, our team would love to connect 1:1 to review your experience in more detail and see how we can make this right.




