Welcome to Healthcare Magic Hi I am Dr Fahim and I will help with your Query I have gone through your question. It appears to be dermoid cyst keeping in view the site and age. However it needs further clinical examination, which will help us in assessing features of lump like consistency, mobility/fixity with underlying structures, skin mobility over the swelling. CT scan and MRI are usually performed to know about its extension into the skull bone as it is known for intracranial extensions. Other possibilities are Pilar Cyst and Pilomatrixoma. The treatment is surgical excision. You need see a general surgeon in your area who after evaluation of the lump, will give you a plan for its treatment. I hope this will help you. Do rate my answer if like it. Regards