Hello and welcome to HCM
Your symptoms indicates about Carpel tunnel Syndrome
but needs to be investigated clinically and by X-rays. It also depends on your age and use of your wrist. Consult your orthopedic doctor and investigate it and rule out other possibility of pain like stiff ligaments etc.
Till you consult your doctor your can try Hot fermentation, Wrist band with thumb support, Local application of gels, don,t lift weigh and in worse condition take analgesic
and anti-inflammatory drugs.
You can also consult your physiotherapist for better procedure like wax bath or exercise of your wrist which help you in reducing your pain.
Best Wishes and have a speedy recovery.