I feel like my eyes are very noticeably sunken (sunken
Improper sleep or allergic rhinitis can be a reason.
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I have gone through your query and pictures with diligence. Sunken eyes can be as a result of sleeplessness, allergic rhinitis ,dehydration, sinus infections or weight loss. Sun exposure can worsen this.
Get enough sleep of 8 hours per day. Be sure you are adequately hydrated. Make sure your urine is not getting dark. Treat allergic rhinitis with steroid sprays after consulting ENT specialist.
You can apply aloe vera gel locally. Applying sunscreen before going into sun is also recommended.
Let me know if anything not clear.
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