Humans detect taste with taste receptor cells. These are clustered in taste buds and scattered in other areas of the body. Each taste bud has a pore that opens out to the surface of the tongue enabling molecules and ions taken into the mouth to reach the receptor cells inside.1  salty.2  sour. 3  sweet. 4  bitter.5  umami.umans detect taste with taste receptor cells. These are clustered in taste buds and scattered in other areas of the body. Each taste bud has a pore that opens out to the surface of the tongue enabling molecules and ions taken into the mouth to reach the receptor cells inside. 1  salty. 2  sour. 3  sweet. 4  bitter. 5  umami.
Raynaud's Syndrome May be the Cause of Your Fiery Fingertips. Another major cause of burning fingertips is Reynaud's Syndrome. This condition is brought about when the blood vessels that supply the hands and/or feet narrow. In individuals with Reynaud's, episodes of burning fingertips are exacerbated by exposure to cold.
Repeated and increasingly prolonged depletion of blood flow to the fingers can cause ulcers in the skin and tissue death (also called necrosis, see Figure 3). The other cause of cold hand or fingers is vaso-occlusion, which happens when one or more of the blood vessels in the hand or wrist become blocked. Raynaudâs Disease and Raynaudâs Phenomenon. There are many specific diseases of blood vessels that can cause vasoconstriction and vaso-occlusion.