Allergic rhinitis (hay fever) Flashcards
What is allergic rhinitis?
Hay fever
occurs after an inflammation response releasing histamine due to allergens being deposited on the nasal mucosa.
In allergic rhinitis, list some common allergens
When is allergic rhinitis worse?
Grass pollen, tree pollen, fungal mold spores
Worse when pollen count is high. Peak at May-July, but symptoms may start in April, when tree pollen appears
Define perennial allergic rhinitis
year-round symptoms due to house dust mite, animal dander and feathers
Time scale for intermittent allergic rhinitis
<4 days/7 or <4 weeks
Time scale for persistent allergic rhinitis
> 4 days/7 and >4 weeks
Describe mild allergic rhinitis effect on life
normal sleep, normal daily activities including sports, leisure, work/school, symptoms not troublesome
Describe moderate allergic rhinitis effect on life
abnormal sleep
impairment of daily activities including sports, leisure.
Problems at work/school
Troublesome symptoms
Treatment timescale of allergic rhinitis
with treatment should resolve within 5 days
Symptoms of allergic rhinitis
- Rhinorrhoea
- nasal congestion
- nasal itching
- irritation of roof of mouth
- itchy and watery eyes, tear duct congestion
- sneezing
Define rhinorrhoea in hay fever
runny nose, thin discharge, clear, watery, but can change to thick, purulent suggesting infection, but no need for antibiotics - treat hay fever as normal
Cause of nasal congestion in hay fever and signs it is severe
Examples of secondary inflammation
Nasal congestion is due to inflammatory response causing vasodilatation of nasal blood vessels.
Severe=headaches and earache.
Secondary inflammation= otitis media, sinusitis
what causes the eye symptoms in hay fever?
direct inflammation in the eye due to pollen
Describe the pattern of sneezing in allergic rhinitis
sneezing is more severe in the morning and evening when pollen rises and settles
Gets better with rain.
If the cause is fungal mould spores, however, then it is worse in damp weather, present in September
referral criteria for allergic rhinitis
- failed medication
- wheezing/shortness of breath (asthma - sometimes only during summer=seasonal asthma)
- tightness of chest
- painful ear
- painful sinuses
- painful conjunctivitis
- failed medication
Lifestyle advice for hay fever/allergic rhinitis
sleep with windows closed
avoid being outside when pollen count is high (mid morning/early evening)
get someone else to cut the lawn/grass
avoid stroking animals
drive the car with windows and vents closed
Vacuum regularly