Our expert says:
I have indeed done some research and they are basically blocked sweat ducts that become nodules in the deeper layer of the skin, clearly as they are under pressure they can become painful and can resemble corns and or warts which will be a common differential diagnosis. Treatment is removal by any of a few methods including but not restricted to freezing surgical excision or punch biopsy.. Unfortunatly they can in some instances become malignant (but not always and you should not panic but rather be pro-active about the management)
and there is a strong family history as well a s a few different presentations. Having had one or two removed is no gaurantee that you wont get any more.. I strongly suggest that you develop a good relationship with a dermatologist near you and if you see or feel anything on your feet treat it sooner rather than later.. This will probably become an ongoing issue or it may be a once off.
I hope this has helped ( indeed I learned from this question )
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.