How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dr. D. Evans Your Own Question
Dr. D. Evans
Dr. D. Evans, Doctor (MD)
Category: Health
Satisfied Customers: 4464
Experience:  MS in ENT and Head and Neck Surgery , Attachment to Neurosurgery.
Type Your Health Question Here...
Dr. D. Evans is online now
A new question is answered every 9 seconds

I have a small hard lump on knuckle on thumb which is

Resolved Question:

I have a small hard lump on knuckle on thumb which is painful when I press on it. Its been there a while. I''m wondering if its caused by constantly spinning my pen on my thumb. Any ideas what it is? thanks
Submitted: 9 years ago.
Category: Health
Expert:  Dr. D. Evans replied 9 years ago.


This appears to be a ganglion cyst. Ganglion cysts are benign, harmless growths, but they will continue to enlarge at a slow rate and when they are big enough may cause pain during movement or by compressing nerves of the joint.

You should take treatment for this. The commonest treatment is by draining the cyst with an injection and injecting hyaluronic acid into the cyst, this is a simple procedure which can be done at a clinic. Your doctor may also advise excision.

You should look up these sites:

I hope this answer was helpful. If you need more information, feel free to ask. For accepting this answer, please click on the green 'accept' button below. Feedback/Bonus will be warmly appreciated.

Dr. D. Evans and 3 other Health Specialists are ready to help you