For most people, starting with 1-2 sessions per week is a safe frequency to allow your skin to adapt. Each session should be brief, perhaps 5-10 minutes total. You can gradually increase to 3-4 times per week if your skin responds well, but daily use is often unnecessary and may not provide additional benefits while increasing the risk of irritation.
Pay close attention to how your skin looks and feels immediately after and the next day. Signs you may be overdoing it include: persistent redness that lasts more than an hour, increased sensitivity, a feeling of tightness or dryness, or the appearance of small broken capillaries (tiny red or purple lines). If you experience any of these, stop using the cups for at least a week to let your skin recover, and when you resume, use less pressure and reduce the frequency. The tool is meant to complement a skincare routine for cosmetic purposes like improving the look of skin tone. It is not a substitute for professional treatments or medical advice. Consult a dermatologist or skincare specialist if you have chronic skin conditions, are pregnant or breastfeeding, or are unsure about incorporating this tool into your regimen.