Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services for signs of a severe allergic reaction after treatment, such as difficulty breathing, swelling of the tongue or throat, collapse or severe dizziness.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek urgent medical help for severe eye pain, marked eye swelling or a change in vision.
3
Does any of this apply?
Book an appointment
Arrange routine medical or pharmacy advice if:
You are unsure whether you have pubic lice
Treatment has not removed the live lice
You are pregnant, breastfeeding or treating a young child
Lice or eggs are present on eyebrows or eyelashes
The skin is becoming increasingly sore, swollen or discharging pus
You want testing for other sexually transmitted infections
You may have reacted to a treatment product
The article also says
A child with pubic lice, particularly on the eyelashes or eyebrows, should be medically assessed.
Pubic lice can occasionally spread through shared household items, but healthcare professionals must also consider whether inappropriate sexual contact could have occurred.
Every sign above is quoted from the sofidex article on Pubic lice. If you are not sure, err upward — it is always reasonable to be checked.