Ignition is usually the easiest of the three to check because on most engines, all you have to do is pull off a plug wire and check for spark when the engine is cranked. On coil-over-plug DIS systems, there are no plug wires so you have to remove a coil and use a plug wire or adapter to check for a spark.
Stress can affect every part of your body. muscle aches, head aches, how your hair grows, the texture of your skin, it can affect your menstrual cycle.
How stress affects your sinuses? Stress is a very common health problem in the U.S. Whenever you become stressed, any sickness that you may have become worse. Medically, when you're stressed, your antibodies (the white cells that defend your body) become ready for action, and when stress last longer they grow weary and become weaker.