Hello and thanks for the query
As per the symptoms you have explained in your mail, It seems that you a corn
on your thumb. It is a hard dead cells that has no pain but it hurts when you press it.
To get rid from it you can use corn cap for 4-5 days but it is not a sure treatment. And other option is the excision of the corn by a trained Surgeon.
Please don't try to cut it by yourself as you have done. It will reoccur again. It should be excised completely to avoid reoccurance.
Hope you have got your answer.