I'm not sure exactly what you're describing here, but it might be the conjunctiva, the tissue between the base of the eyeball and the edge of the lower lid. This can become infected for different reasons and in a young pup could be associated with distemper or some other disease.
NOTICE: The information provided on this site is not a substitute for professional medical advice,
diagnosis, or treatment. Never delay or disregard seeking professional medical advice from your
physician or other qualified health provider because of something you have read on Wellsphere.
If you have a medical emergency, call your doctor or 911 immediately.