Why is there a hard bump on the back of my head?

Related questions

1. Can blood test detect lymphoma?
2. Where are the lymph nodes in the head?
3. Can you feel a normal lymph node?
4. Are pea sized lymph nodes normal?
5. Are there lymph nodes in back of head?
6. Should you be able to feel lymph nodes in your neck?
7. What causes swollen lymph nodes on back of head?
8. What causes occipital lymph nodes to swell?
9. What do occipital lymph nodes do?
10. Can a scalp infection cause swollen lymph nodes?

Tags

1. #pilomatrixoma
2. #because
3. #typically
4. #feels
5. #calcify
6. #under
7. #tumor
8. #commonly
9. #noncancerous
10. #after
11. #these
12. #occur
13. #forms
14. #cells
15. #tumors
16. #touch
17. #slowly
18. #occurs
19. #grows