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1.The possible cause could be infective aetiology - hair follicular infection with collection with in causing pain and tenderness.
2.Another cause could be
lymph nodal enlargement which is seen after any infection or inflammation any where in the body but generally not painful.
3.The remedy and care you have to take - do not squeeze or scratch the lumps, that will irritate and complicated and recurrence chances are more.
4.Avoid clothing that cause the irritation to the area - try using soft clothing that all not effect on the area.
5.Maintain local hygiene, avoid shaving the hair until complete healing, use trimmer instead for
hair removal as the creams causes irritation.
6.Clean when ever possible with antiseptic liquid. that will help to get rid of recurrent infection. If no use then get it examined and treated according to the findings. Good luck.
Hope i have answered your query.
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