Trauma most common: Injury would be the most common cause. It can be caused by infections around the nail (paronychia) or rarely by tumors under the nail. It is difficult to be any more precise than this without examining your thumb.
Answered 3/25/2023
5.8k views
4 doctors weighed in across 3 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question