What could be the reason for having a pale spot on my upper lip?

Hello,

Welcome to icliniq.com.

In my opinion, there are two main causes for this pale spot.

1. Post-inflammatory depigmentation - It means that it is normal skin response to any trauma like a previous burn or vesicle or itching to heal either with hyperpigmentation or hypopigmentation. In your case, it is hypopigmentation. This does not require any treatment. It could be permanent.

2. Vitiligo - It could be spontaneous or autoimmune. Please apply Hydrocortisone cream two times a day for seven days.

Hello,

Welcome back to icliniq.com.

Yes, it is fine to apply Hydrocortisone cream on the affected area even if you work in the sun. If you work in the sun then please regularly use sunblock 20 minutes before going outdoors and apply two to three times a day as sunblock gets wasted and washed away with sweating. Apply Hydrocortisone in the morning and the evening. After 15 to 20 minutes of the application, then apply sunscreen.