Thanks for posting your query at DoctorSpring. I can understand your concern.
From the pictures, the lump seems to be an epidermal cyst.
An epidermal cyst is a benign tumor of the skin. It will not cause any harm to you, however it is better to get it treated by getting it excised from your dermatologist.
The other small bumps are of folliculitis which is bacterial infection of the skin. It can be caused due to shaving.
I would recommend that you apply fusidic acid cream over it twice a day.
You can apply the same cream over the epidermal cyst just to take care of the infection that may have occurred on it due to shaving over it.
Hope this helps. Please let me know if you have any more queries.