I have been diagnosed with a ganglian cyst in the synovial joint of my thumb, (ultrasound test confirmed this), I have just had surgery on the same hand for carpal tunnel and afterwards noticed that around the ganglian cyst area a redness appeared, two weeks later it has gone into hard crustacious skin and seems to be spreading, I have applied calendula oil and various creams daily, but no difference, should I see a doctor?? thankyou