Is there any specific term for someone who feel the need of constantly learning something new ? like a learning disease.
What should the appropriate term be?
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Bookworm may refer to excessive dedication to learning:
- a person excessively devoted to studying or reading (Collins)
The closest single definition to what you've outlined is a philomathic, from the Greek root φιλια (philia) meaning love and μαθανω (mathanó) meaning learn. It's an adjective and it means: relating to or enjoying the process of learning new facts and acquiring new knowledge. As in, "All he did was study and read all day. His friends thought he was crazy, but he was just philomathic".
It's not exactly what you asked for, but I think inquisitive is not bad
given to inquiry, research, or asking questions; eager for knowledge; intellectually curious: an inquisitive mind.