Hi,Dear,Welcome with your query to HCM. Studied your query in full depth of its details.Reviewed it in context of your health concerns. Based On the facts, You mostly seem to suffer from- Acute Frontal Sinusitis with subperiostial Cellulitis of the forehead.Thats why it is red un-noticeable lump. So this is not a brain tumour. Treatment - After assessing the reason of this tumour,by getting Sinus X-ray and X-ray skull and CT skull ,Ent Surgeon would start Intravenous antibiotics to reduce the risk to anterior cerebral fossa spread / and would plan drainage of the pent up frontal sinus infection. Anti-inflammatory drugs likd Motrin and chymoral fort would be needed to control the cellulitis with antibiotics. CT skull prior to frontal sinus drainage is a MUST to rule out the Ant fossa invasion by frontal sinus infection. Frontal Sinus drainage would be by Incision and drainage / or by endoscopic sinus drainage. Plenty of fluids and long antibiotic cover would resolve the cellulitic forehead lump of yours. Discussion with your Ent Surgeon would help you to recover fast out of this forehead lump. Hope that ,This reply would help you to plan further treatment soon with your treating doctors.Best of Luck and early recovery. Welcome any further query in this regard,which would be replied in next session. Good Day!! Dr.Savaskar M.N. Senior Surgical Specialist