Galvanic microcurrent treatments can have several effects on facial skin. They deliver very low-level non-therapeutic electrical currents to stimulate facial muscles and improve circulation. After a session:

1. Improved circulation: Microcurrents and device movement can increase blood flow, which may result in a temporary flush or rosy complexion. This increased circulation can also help deliver nutrients to the skin cells, promoting a healthy glow.
2. Tighter, firmer skin: The treatment may temporarily tighten and firm the skin due to your skin's inflammation response. This can result in a more lifted appearance and reduced signs of sagging.
3. Reduced puffiness: Microcurrents can help drain excess fluid from the face, reducing puffiness, particularly around the eyes.
4. Enhanced product absorption: The electrical currents can aid in better absorption of skincare products following treatment, allowing the active ingredients to penetrate deeper into the skin.  

The immediate effects might include a refreshed and rejuvenated appearance, though these changes are often temporary and may require regular treatments for sustained results. Following post-treatment care advised by a professional is essential to maintain the benefits.