Cristiano Ronaldo: Mama's Gonna Fix Everything

Cristiano Ronaldo started his day in the sun by getting oiled up real good ... by his mom.

Cristiano's still on vacay with his fam in Ibiza -- and mom was NOT shy about slathering tanning oil all over the back of his $200 million legs Wednesday on their yacht.

Looks like she avoided too much contact with his left leg ... where he's nursing the MCL injury that took him out of the European Championship.

Tight family -- gets ya through the hard times.