I cannot feel pain

Dear Customer
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what is the treatment of forehead lump that been untreated for long time :

1. visit a surgery clinic to do the needed medical examnations the determine the treatment pathways 
2. becarefull about your forehead and avoid any injuries in the future especially in the same area to avoid worsening the medical condition 
3. after doing the examnations , doctors may require you to do a surgical drainage , or maybe an open surgery to take out the mass 
4. doctors may prescribe some antibiotics later on to avoid infections ( orally and topical ) 

possible reasons for your case :

1. untreated injury 
2. blood clot 
3. your body exachange the injury area with different tissue or pus 

needed medical examnations :

1. phyisical examnation by doctor 
2. blood and blood chemistry examnation
3. biopsy 
4. brain CT scan 

our advice :

we strongly advise you to visit a surgery specialist and do the needed medical examnations and folllow doctors instructions .
You can also ask our other certified experts in various fields such as: Nutritionists, Lawyers, IT Experts, Therapists, Mechanics, Doctors, Handymen, and more.
Kind Regards