Noise-cancelling headphones are battery-powered headphones that actively cancel out the ambient noise surrounding a listener. The most common use for them is during plane journeys. While sound-isolating earphones will block out chatter, it won't get rid of the noise of a jet engine. Noise-cancelling headphones will. Put simply, they work by using tiny microphones that listen to the noise surrounding the listener.
detected esophageal lichen planus in 12 out of 24 patients diagnosed with orocutaneous lichen planus. One-third of these patients showed symptoms such as dysphagia and odynophagia. 2 Esophageal involvement is more frequent in patients with oral lichen planus than in anogenital or cutaneous manifestation.
They appear as white, lacy rashes inside the cheeks or mouth. They may occur before the appearance of any skin rashes. Another variant that occurs as a troublesome sore is the erosive lichen planus, a rare type of lesion that causes shallow, painful, and recurrent mouth ulcers. Oral Lichen Planus Symptoms: Mouth pain; Red, open sores in the mouth