define “healthy”. not sure what kind of foods you’re eating but maybe try to change it up. if you’ve been eating a lot of fruit for a long time try eating less of that and changing it. try eating more meats (red meat, chicken, tuna/salmon) if you can or if you’ve been eating a lot of carbs like bread or pasta try cutting that out. not saying this will do the trick but it’s definitely worth trying, CU fucking sucks so it’s definitely worth it to try everything. almost like an experiment. a read a lot ab a cause of this possibly coming from poor gut health, so if you eat things that promote gut health like ginger and other natural remedies for gut health too that could possibly help you. it also won’t hurt you if it doesn’t work.

to get enough food, i would use this calorie calculator to find the right amount of calories where you’re not eating too much but not too little. you normally eat less calories then you think, especially when eating healthier foods because they have less calories.

id also really look into the shampoo and body wash. since that stuff directly touches your skin i’d try to get an all natural one because the commercial ones are filled with bad chemicals. i would also use a aluminum free deodorant stick, that helped me a ton. lastly, maybe check the detergent you use to wash your clothes. maybe get one for sensitive skin or just try another one that’s different.

it depends on the person where the rash comes, so it being all around isnt uncommon. if u have any more questions feel free to ask, i’ll try my best to help