Hello and welcome to HCM
In my personal opinion it is better to diagnose what is the lump is? Because it really increased in one month. Precaution is always better than cure.
If your lump is causing pain, increasing with time or causing any deformity
than you have a matter of concern and immediately get checked by your doctor.
FNAC or Needle test is the diagnostic procedure for the lumps like this.
So get your FNAC done and what the lump is? is it necessary to remove it or not?
Hope you got your answer