Antiseptic and anti-inflammatory: Eucalyptus oil has a cooling, slightly drying effect and can disinfect skin. It shows modest efficacy in aiding wound healing and controlling acne due to its antimicrobial action, though evidence is limited. It may also help reduce oiliness (as an astringent). Use with caution: at higher concentrations it can irritate skin, and peer-reviewed support for strong benefits is limited.