Probably a muscle: strain, but it could be something more serious, such as thrombophlebitis, pneumonia, or even pulmonary embolism. Best to show it to your doctor.
Answered 11/27/2017
1.3k views
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question