Re: Oh hurray. Lumps.
As said before- could be a bite, or a rash, which is common in the area. Might even be an allergic reation. It probably isn't bad, but if it is painful and persistant, it is probably something good to show a doctor.
As always- None of my statements are evaluated by the FDA.
My advice is not intended to diagnose, treat, cure or prevent any diseases unless prescribed by a health practitioner. All information is provided for educational purposes only and should not replace the advice of your medical doctor.
(but your medical doctor will probably end up killing you