The bump on the head albeit related to vision is most likely a cystic lesion unrelated to the bump. More often than not, what you are describing will be a sebaceous cyst that needs a simple excision under local anaesthesia. Prior to this a B.P & opthalmology (eye) check up is in order in person given your particular complaint. I dont envisage any long term issues. But one has to do this in person with a general surgeon
, competent Gp or a dermatosurgeon on the ground & am afraid this is the best advice we can offer online! Cheers!
Dr Praveen Rodrigues MD