Super Vasmol 33 Kesh Kala is a hair oil with a colouring agent used to darken hair. It is applied externally to the scalp and is not typically absorbed into the bloodstream in significant amounts, so it generally does not directly affect sinus conditions. However, people with sinusitis or respiratory sensitivities may sometimes find strong fragrances or chemical ingredients irritating. If you have sinus issues, it is best to test a small amount first and use the product in a well-ventilated area. For personalised advice, consult your doctor or dermatologist before use.