Hello Essodonda ,
Susceptability to PIH and it being stimulated through UV exposure is very common. However wearing sunscreen constantly during treatment isn’t advisable. For most of it, it’s fine but during the 24-48 hours immediately following treatment, I tend to recommend people use a wide brimmed hat instead, and not have extended sun exposure . The reason for this is sunscreen is not generally hypoallergenic, and any contaminant can cause minor infection of the electrolysis sites . So for the first day or so after treatment, Don a good wide hat when in the sun and leave the sunscreen at home. Once you are past the 24 hour mark this is much less of a concern ( as the follicle is closed over as it was before, nothing gets in , nothing gets out) .
As for trimming hair, it does sound like you have good advice. The idea behind not touching the hair, is so the maximum number of hair follicles that are possible to treat are present. Assuming you are getting full clearance each time, then not trimming makes sense. However if the longer hair is bothering you in between, the other option would be to just have shorter appointments done weekly, so the hair doesnt grow long enough to become a problem
Seana