A mother was killed by a wasp after a rare illness made her super-sensitive to stings.
Retired shopworker Angela Jacqueline Kendrick, 69, collapsed from allergic shock after being stung while on a family holiday in the countryside.
An inquest heard she had Mast Cell Disorder which puts sufferers at risk of high sensitivity to stings and can kill.
But her family said she was not made "fully aware" of the risks of the allergic reaction - and tried to use an onion to get treat the sting.
Mother-of-two Angela, of Hatfield, Herts, collapsed on a family break in the Brecon Beacons in September last year.
Her daughter Allison Kendrick, 46, called for other sufferers to being warned of the dangers of the reaction to stings.
The hearing was told former Boots and Tesco worker Angela was on the family break with her two daughters and retired butcher husband David, 72, when she was stung.
Allison heard her father say: "Have you been stung?" before a commotion broke out in their rented holiday cottage.
She said: "Mum was trying to treat the sting using an onion.
"I said to her: "What are you doing?" She replied: "I'm trying to get the sting out."
Allison told the inquest the old wives' tale treatment of an onion for a sting showed her mum's "lack of education" about her condition.
Her sister injected adreniline from her mum's EpiPen on her to counteract the allergic reaction as the family called an ambulance.
But the inquest hear Angela began having trouble breathing, described by her daughter as an "awful rasping which was "horrible."
Mrs Kendrick was taken to Nevill Hall Hospital in Abergavenny because paramedics had run out of adreniline medication - but she was pronounced dead at 10.15am.
Allison told how her mother was diagnosed with Mast Cell Disorder in 2003 - an excess number in body tissues of the cells which fight allergic reaction.
But she was not warned about the dangers until she suffered a sting seven years later.
Her family say she was not referred to a specialist until last year - but her treatment was not due to start until three months after she died.
A post mortem examination gave the cause of death was anaphylactic shock and wasp sting.
Newport Coroner's Court heard Mrs Kendrick would have "benefited" from being provided with further information about anaphylaxis from doctors and being put in touch with a support group.
Offering her sympathy to the family, she recorded a narrative conclusion that Angela's reaction to the sting was so severe "due to her existing Mast Cell Disorder."