| You should find a point (or several) that will be very painful to your finger's pressure: something like a small ball of grease (lipodystrophy) that you can roll under your finger.
Once you have found it
Gently apply pressure, which will make the patient grimace with pain. Now massage mildly while pressing just to the limit of the pain the patient can endure. At this time, the person should inhale deeply. You will discover that the breathing becomes easier. If massaging and pressing the most painful point is not sufficient to make the person feel 100% better, look for another lump nearby the one you are working on, or under the right armpit (very rare). This should take complete care of the crisis.
This technique is of no use in breathing difficulty that is not asthma but a spasm of the throat (pharynx). This condition is sometimes called "false asthma."