go bright red and burning hot for seemingly no reason at all at any given time.It will stay this way for anything up to 1 hour long.( It does not go "sweaty" just glowing hot)
redness may be caused by a disease such as Rosacea for which topical metronidozole and oral oxytetracycline may be indicated.
There are some good over the counter products for facial
redness called Rosaliac. These are available from selected Boots stores in the UK and online.
Eucerin also make a less expensive range called Redness Relief.
I suffered with facial
It may also be helpful to identify what triggers the redness.
Potential triggers for facial redness are extremes of temperature, caffeine, alcohol, spicy foods, foods high in histamines and hot food or beverages.
Use bland cosmetic such as those by La Roche-Posay or Eucerin.
Ask your doctor whether taking an anti-histamine such as Piriton (chlorpehnamine maleate) would be of benefit to you.
Eloise.