The association said in a statement that anosmia or hyposmia - the medical terms for the loss of smell - have particularly been noted in COVID-19 hotspots around the globe.
According to them, many patients around the world who have tested positive for coronavirus are only showing symptoms of loss of smell and taste, while missing more commonly recognized symptoms of high fever and coughing, reports Business Insider.
"We really want to raise awareness that this is a sign of infection and that anyone who develops loss of sense of smell should self-isolate", Professor Claire Hopkins, president of the British Rhinological Society, wrote in an email.
In the United Kingdom, the NHS guidance is to self-isolate if you have either a high temperature or a new, continuous cough.
Professor Nirmal Kumar, president of ENT UK, a body representing ear, nose and throat surgeons, said covid-19 patients are presenting with these symptoms, even when they do not have the other more common symptoms of fever and cough.
The lack of other recognised symptoms in these cases may mean they are unlikely to be tested and isolated, meaning they could be contributing to the rapid spread of the disease around the world.
The American Academy of Otolaryngology on Sunday posted information on its website saying that mounting anecdotal evidence indicates that lost or reduced sense of smell and loss of taste are significant symptoms associated with COVID-19, and that they have been seen in patients who ultimately tested positive with no other symptoms.
The loss of taste and smell could be crucial warning signs in "hidden carriers" of the novel coronavirus, experts have revealed.
The professors called for anyone presenting the symptoms of loss of taste or smell to be instructed to self-isolate for seven days to prevent the potential further spread of the disease.