Hello and welcome
The size of the bump is increasing with time is paining when pressed. So you have every reasons to be investigated for the bumps. The bump may be a gland cyst
or a tissue collection. The investigation like sonography
or FNAC (Fine needle aspiration cytology) is very helpful in getting to the diagnosis.
Consult your doctor and go for the investigations and than treatment. Surgery for removal may be needed depending upon the report of FNAC.
Hope this will help you.