Molly With A Spot On Its Head

[blayzen]

Can any one help I got a hite molly female with a raised spot on her head. Any and all info would be awesome. Not able to get a picture of her at moment.

 

[Blitz]

can you fill this in? Maybe you'll get more help.  
Tank size:
pH:
ammonia:
nitrite:
nitrate:
kH:
gH:
tank temp:

Fish Symptoms (include full description including lesion, color, location, fish behavior):

Volume and Frequency of water changes:

Chemical Additives or Media in your tank:

Tank inhabitants:

Recent additions to your tank (living or decoration):

Exposure to chemicals:
 
 
And what color is the lump? is it white? Or same color as the fish itself?