"MODERN LASS" wrote

Hi! My upstairs bathroom sink hot water tap has stopped working with no
water at all flowing. I don't think that its the water pressure as the
other 3 taps in the bathroom are fine ...any ideas?

Someone playing with the shutoff valve in the vanity (under the sink)?
Frozen pipe? (see other posts)
Plastic supply line crimped by shoving too much stuff into vanity?
Handle stripped, and isn't turning the stem?
Washer retaining screw came off, and washer is stuck to seat?
Washer disintegrated and plugged internal passages?