For dark eye circles, there’s usually 2 problems involved.
1) Loss of volume resulting in a depression called the tear trough (best treated with low viscosity fillers like Restylane Vital Light, Belotero Soft, Teosyal Redensity II)
2) Accumulation of venous blood , pigmentation at the dermal layer (best treated with Teosyal Redensity II containing vitamin C and glutathione , or Vitamin C infused monofilament threads)
For eyebags , there are 1) real eyebags (needs surgery by a plastic or facial plastic or oculoplastic surgeon) or 2) fake eyebags (tear trough- needs fillers only)
Hope this answers your question!