Yes concealer may cause acne. Heavy oils such as coconut oil and olive oil can clog pores and exacerbate acne. Check the ingredient list and avoid products that contain these pore-clogging ingredients
To conceal hyperpigmentation around the mouth, use a color corrector in a peach or orange shade to neutralize the darkness, then apply a full-coverage concealer matched to your skin tone. Finish with setting powder for long-lasting coverage.
You can cover the black eye by following our these tips: 1. Prime and Hydrate 2: Apply eye cream 3. Neutralize with Color Corrector 4. Conceal Like a Pro 5: Set with Setting Powder 6: Blend and Finish