In reply to nickinscottishmountains:
If her "blocked sinuses" or whatever they actually are, are causing her pain, then go for paracetamol 1g (usually two tablets) four times a day, with ibuprofen 400 mg (usually two tablets) up to three times a day as required. Ibuprofen reduces swelling (and her nasal lining will be swollen) but it is an excellent painkiller, even more so when combined with paracetamol. It also treats fever.
Decongestants (like otrivine/ephedrine) work really well and really fast, but are short-lived, so she'll have to keep taking them frequently to get benefit from them. That's fine for short periods of time (e.g. a few days) but folks need to be aware that if you take them longer term than that, you will develop "rebound" worsening of symptoms if you stop taking them, which isn't great.
If she has headache + fever + horrible green stuff running from her nose, and it's not getting better in a few days, she might benefit from being seen by a doctor. Proper sinusitis should be treated with antibiotics (for 14 days - 7's usually not enough) in addition to the above.
Other suggestions: hot water bottle, blanket, sofa, comedy DVDs, frequent tea/honey/lemon, and vaseline or similar to keep nose from getting irritated.
Get well soon!
Pete.