Our Lord must have spent a lot of time staving off a headache. Granted, as Son of God He likely did not keep headaches, but being fully human He probably did get them under the right conditions. Discussions with the Pharisees almost always certainly, in my mind, qualify as the right conditions. Today's Gospel for Mass (Lk. 15.1-10) definitely qualifies.
The prevalent attitude among the religious establishment of the day was that of exclusion. Was someone a Jew? Was someone a convert? Did the person observe kosher properly? Did they have the right job? If someone fell afoul of any of those characterizations they were out on their ear. No one wasted time on the outcastes, no one thought them worthy of God's favour.
Our Lord clearly went counter to this. He freely associated with and taught the outcastes. He showed the love and forgiveness of God and the way out of their dire straits. Tax collectors were taught to be honest and to redress any fraud they committed. Prostitutes were told they could forsake letting men objectify them and use them and enter the Kingdom of God. That no matter what they did God would not turn them away, that He was right there ready to enfold them in His loving embrace.
The religious establishment could not abide this. They grumbled. They complained. They eventually would tack Our Lord onto a crude torture device to slowly kill Him simply because He turned their assumptions and expectations on their ear. He made it very clear that those already in the fold had honour aplenty (much like the Prodigal Son's elder brother), but that the real fuss was over those who were on a path of self-destruction who turned around to forsake all that and embrace God. Those who were righteous and stayed righteous were the backbone of the Kingdom, but those who found the Way and turned to it were the ones who sparked the real excitement. That is what makes the angels sing.