Thank you for posting your query.
I have noted your symptoms. These are most likely to be due to migraines. Migraine can cause headaches
along with dizziness
The bumps on the scalp are not related to your symptoms and are most likely lipoma
or sebaceous cyst (a clinical examination could confirm the diagnosis).
Fo relief of symptoms, you could take ibuprofen
for headache and betahistine
I hope my answer helps. Please get back if you have any follow up queries or if you require any additional information.
Wishing you good health,
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad, India
Click on this link to ask me a DIRECT QUERY: http://bit.ly/Dr-Sudhir-kumar
My BLOG: http://bestneurodoctor.blogspot.in