My middle toe has been swollen and slightly red for 4-5 days. It hurts when I gently press on it. What to do?

See a doctor. You need to have it examined to make sure you do not have an infection.
Swollen toe. There are a number of possibilities for a swollen toe: gout, arthritis, ingrown toe nail, fungal infection, bacterial infection and trauma. See your local doctor for a diagnosis and treatment.