Mars in Taurus tends to hold anger in behind a calm appearance until it builds up. This system considers the position adverse. When that restraint was learned in childhood, it can be hard to recognize and express discomfort before it piles up.
The person may face major situations with striking serenity and yet lose patience over a small change that disrupts their routine. Those who barely know them may see them as very even-tempered, while those who share their daily life notice that stored-up tension.
At times they become defensive and feel that the people around them are against them. If they don’t recognize their own anger, they may read every difficulty as confirmation of that hostility and, without meaning to, help keep the conflict going.
The tension the person feels in the neck and shoulders also matters, as does their need for movement. Noticing that build-up is an opportunity to pause before all the discomfort comes out at once.