You could try salicylic acid, tea tree oil, and coconut oil in a kind of differential diagnosis to see what works best for you. My skin likes salicylic acid ("SA") because I have a malassezia-induced skin condition, but you may be different. I blend the SA powder into lotions and body washes, usually at 0.5% because it has an odd "medicine smell" that I don't like at higher concentrations, but it can be blended up to 10% in lotions.
If you are a "1" or a "2" on the Fitzpatrick scale of skin coloration, you could try salicylic acid to exfoliate and remove discolored skin. Compound up to a 10% salicylic lotion -- for a 10 % mix, first dissolve 10 grams SA in 10 grams food grade vegetable glycerin and 20 grams 100% isopropanol, in a shot glass, cover and heat in a water bath to about 130 degrees F, and then add it to 90 grams of any lotion you like. Shake well.
You'll need to mail order a tenth-gram electric scale, which costs about $30 US, and a half pound of SA powder, which costs about $15 US.
Do not apply this lotion near your eyes, or above your eyes if you are going to the gym for a workout. If you experience a burning sensation, rinse with Aloe Vera gel, and reduce the lotion to a 5% mix with an additional 90 grams of lotion.
Or, mix up to 50% tea tree oil in avocado oil, which will treat a demodex-induced condition.
Or, apply coconut oil, which will treat a candida-induced skin condition, but which will make a malassezia-induced condition much worse.
If you try each of these three treatments, by itself, for 2 weeks, you can perhaps diagnose what you have and what works for you. Dermatitis often involves more than one causative factor, so keep an open mind.