The other person was right on both guesses.. Growing pains or sleeping/resting on it incorrectly.
It could also be caused by overworking it.
All three of those options can lead to cramping or what feels like an ache near the joint (unless it`s not at a joint, then it`s probably just a little muscle cramp).
The only cure is rest. Antibiotics don't work because these are viruses and cold medicines help with symptoms so you feel a bit better but rest is really the only cure.
Lumpectomy helps confirm a diagnosis of cancer or rule it out. Lumpectomy is also a first treatment option for some women with early-stage breast cancer.