Medical treatments for under-eye dark circles include topical treatments, injectable fillers, chemical peels, laser therapy, PRP therapy, and surgical options like blepharoplasty. These treatments target different underlying causes, such as pigmentation, volume loss, and skin laxity.

Topical Treatments:

• Vitamin C serums: Brighten the skin and reduce pigmentation
• Retinol creams: Stimulate collagen production and improve skin thickness 
• Hyaluronic acid eye creams: Hydrate and plump the under-eye area 
• Skin-lightening creams: Contain ingredients like hydroquinone, kojic acid, or azelaic acid to reduce melanin production

Injectable Treatments:

• Dermal fillers: Hyaluronic acid fillers restore volume to the under-eye area, reducing shadowing and improving the appearance of dark circles
• Platelet-rich plasma (PRP) therapy: Uses your body's own growth factors to rejuvenate the skin and improve texture and pigmentation

Other Procedures:

• Chemical peels: Exfoliate the skin and reduce pigmentation. 
• Laser therapy: Can target pigmentation and stimulate collagen production
• Microneedling: Creates tiny punctures in the skin to stimulate collagen production and improve skin texture
• Radiofrequency or ultrasound-based tightening: Non-invasive treatments that tighten loose skin around the eyes 
• Blepharoplasty (eyelid surgery): A surgical option for severe eye bags or fat repositioning, typically considered when other treatments are not sufficient