Brown blotches on the trunk after sun exposure.
You’ll need your doctor to help you with this one, so please make an appointment. This is often due to one of two things ………….sun damage and no………….sadly 33 isn’t too early to have this. The immediate darkening is due to a UVA effect and if it’s sun damage it can take some months to fade.
The other common cause is Tinea Versicolor which is good yeasty type organism that we all have on our skin. In some people though, it likes to “overgrow.” especially in hot, humid weather. It forms sometimes pinkish and sometimes tannish spots on the skin. A doctor can prescribe something for you. Also for prevention Selsun Blue, scrubbed into the area with a washclot and left on for 3-5 minutes once a week, may help prevent it. The yeast doesn’t like the selenium. See your doctor to be sure.