Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain popping sound in knee along with pain that has occurred after running can be due to causes like Antterial
Cruciate ligament injury [ACL injury],
Medial collateral ligament injury [MCL injury], Runner's knee,Meniscus tear etc..
I would suggest you to consult anOrthopedician and get evaluated and a thorough clinical evaluation and investigations like x ray, MRI scan, Manual tests like Pivot's shift, Lachmans test can help in diagnosis and treatment can be done accordingly..
You can be advised to apply an analgesic and
muscle relaxant gel..
You can also be advised to do cool compresses..
Take anti inflammatory painkiller like Ibuprofen and muscle relaxant like Chlorzoxasone..
You can also be advised to put knee brace and orthotics..
Physiotherapy can be advised..
You can also be advised treatments like Arthroscopy and
knee surgery if conservative treatment does not relieve..
Limit exerting the leg too much..
Take appropriate rest..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.