Hello dear
Understand your concern.
Primolout N conatin synthetic
progesterone.
Primolout N cause hormonal imbalance and that is the reason for side effects.
Following are common side effects:
headaches, nausea, irregular bleeding,
fluid retention, dizziness,
weight gain and depressed mood,
either sleepiness or insomnia,
bloating, a decreased or increased sex drive,
discomfort of the breasts.
So neck lump is not caused by primolut N.
It may be a some other reasons:
It may be lymph node, infection and
cellulitis, thyroid abnormality.
Contact doctor for this
For pain you can take tablet
diclofenac 40 mg three times a day.
Hope this may help you.
Best regards
Dr. sagar