Can anyone help me? hurts to smile. there's flakes all around my mouth and near my nose. not dehydrated. it gets red too. how to treat it?

See below: This could be several things: 1) moisturize your face daily. 2) make sure you are getting proper nutrition. Deficiency in iron, vitamin c, zinc, and magnesium can do this. 3) if the above aren't the cause, you may need a thorough evaluation by your doctor, including that for connective tissue disorders.

Seborrhic dermatitis: You should see a physician to get an accurate diagnosis, but what you have described above probably is seborrheic dermatitis is a common skin disorder that mainly affects your scalp, or face causing scaly, itchy, red . Seborrheic dermatitis can treated with antifungal lotions corticosteroids or selenium selsun blue lotion.