Thank you for your query on Healthcare Magic.
Puffy mons pubis
and puffy neck, back are suggestive of tissue deposition in these areas.
As you are gaining weight, fat deposition is a concern.
Another possibility is hypothyroidism
I advise you to check your weight, calculate body mass index
to look for overweight
Hypothyroidism has to be ruled out by testing blood for thyroid hormones.
Hence I suggest you to consult the physician for examination and investigations.
Hope I have answered your query.