How long does it take for a sprsined thumb to heal ?

Depends : Is it buddy taped so you don't use it as much, 3 weeks if it sprained.

It depends: Minor thumb sprains will usually feel better in 1-3 weeks. A more severe sprain might take several months to heal. Some sprains are so severe that surgery is required. If your thumb seems badly sprained, an evaluation by a hand surgeon is a good idea.