This is a palmar wart. It is a type of viral infection. As you are having pain as well, I think it might be secondarily infected by bacteria. Do not pick or try to remove it yourself. A Dermatologist can easily get rid of this for you in few minutes by doing electrocauterization. It's not an emergency so do not worry. Visit your Dermatologist when you return from your travels.
Answered2016-04-12 11:10:54
Let others know if this answer was helpful