I have a hard lump at the bottom of my sternum, is this normal?

Good morning, Madam,

Unfortunately it is impossible to evaluate this kind of situation on this platform. What I can suggest is that you monitor the situation. If it persists for more than a week, gets worse, or is accompanied by other symptoms (whatever they may be), you should consult a doctor, as a precaution.

I'm sorry I can't be more helpful at this time, it's just that the description of your situation is beyond what can be addressed here.

Sincerely,

Tom Samaha, pharmacist