Took on a pretty bad burn a couple weeks ago from a Friday/Saturday. No sun screen friday, but Saturday morning my arms started baking. used a little spray from a friend Saturday. But shortly after my arms started almost frying. Then a few days later poison ivy set in as well. Got that mowing the yard after the neighbor kindly trimmed the poison filled hedge between us. Finally learned from the doctor that I had a bad sunburn, and a bad case of poison ivy. Very uncomfortable. Still recovering. During my tribulations I also read, heard and confirmed that sunscreen expires. So my sunburn from friday was worsened by basically putting baby oil on my arms. Apparently that's basically what it turns into when it expires. So keep in mind to get new every year, and don't mow the yard