 [ Symptoms ] i am taking tri lo sprintec and was recently prescribed bactrim ds my cycle has not started yet could i be pregnant [ Disease ] i can not think of any reason why a cyst on your hand would cause tendinitis in your feet the two conditions are completely unrelated cysts are small self contained sacs of fluid they are not a systemic illness in any way cysts do not travel through the bloodstream and affect organs or other tissues there simply is no relationship between a cyst in one area of the body and illness or injury in another area tendinitis in your big toe definitely could be influenced by your ballet dancing defined as the inflammation of a tendon tendinitis often is caused by overuse or injury the condition called tennis elbow is a classic example of tendinitis related to overuse thus it is not at all out of line for your doctors to conclude your big toe tendinitis relates to your ballet activities and not to the cyst on your hand there is no scientific evidence the two could be related hope this sets your mind at ease