Since 4 days my left hand thumb muscles hv pain wen i press thn pain is severe where it joints from palm.. please guide some exercise..or how to cure?

De Quervain's: Tenosynovitis. Look this up and read about it and see if this is consistent with your symptoms.

Muscle pain: You may have a tendon or muscle inflammation called tenosynovitis. I recommend treating the inflammation with RICE: rest, ice, compression, elevation. Apply ice over a towel or cloth, at 15 minute intervals. Try to elevate your hand, apply an Ace bandage for compression - remove at bedtime. Avoid strenuous movements of the hands like gripping handlebars or playing the piano for a week.