Scientists turn off the need to cough but then you can't feel heat anymore. The resone for this unexpected phenomenon is due to the fact that the same cellular receptors that sense temperature and pain also control coughing. The cool relief of a cough drop is no coincidence, as the menthol receptor both suppresses coughs and produces the cool feeling in your throat. There’s a molecular on-switch for coughing, too: a receptor called TRPV1. Unfortunately for researchers looking for a cough cure, inactivating TRPV1 also makes it dangerously difficult to feel heat. Mundane tasks like eating a hot meal or running a bath become hazardous if you don’t reflexively shrink away from scalding heat.