I get severe headache , stiff, sore neck and rash on my face . These symptoms last up to 2 weeks, especially bad after I have been to the hairdresser and when I sleep on my back. Have a lump at the back of my neck that appears and disappears.
Have you used any hair dye etc? It is very common with allergic reaction to some chemical. Avoid chemical dye. All that you need to check your sore stiff neck is hard Chat Doctor.  This will also check your headache and facial rash. You can add tab. Allerin 2 BD.