Hello
As you mentioned that you noticed eggs and in large number, these eggs are of louse ( 
lice ) and most common site fro their breeding is in the hairs root . 
You can check with naked eyes . Main reason is unhygienic  condition.
Diagnosis can be confirmed by physical examination by a 
dermatologist and blood examination for lice .
When such patients visit I advise them these measures, these include.
Wash pubic hairs with PERMETHRINE SOAP , apply soap over effected area , rinse ,there develops leather , keep it for 2-3 minute then wash with water . 
Now apply permethrine lotion all over body (except mouth and eyes) for three consecutive days.
One dose of DOXYCYCLINE 100 mg or 
erythromycin 500 mg is very much effective .
The main important point is personal hygiene , and this is the reason that this infection spread from human to human ( only reservoir ).
Hope this information will help you.