evidence: Fact Check: Does inhaling camphor increase blood oxygen level, relieve respiratory distress? [...] Recently, a viral message claiming that inhaling the vapour of camphor, clove, ajwain and eucalyptus oil can increase blood oxygen level and even relieve respiratory distress is being shared across WhatsApp and Twitter. [...] On the other hand, there is no evidence to suggest that clove, carrom seeds, or Eucalyptus oil can increase blood oxygen or relieve respiratory distress.