Vayu Mudra

VAYU MUDRA OR VAYU SHAAMAK MUDRA
Popularly known as Vaayu mudra, this mudra decreases the vaayu (air) element within the body. 
Effects : Vaayu-shaamak mudra decreases the air element within the body. This reduction of air Sedates restless and anxious mind, Calms overcharged nervous system, Pacifies overactive endocrine glands, Relaxes tense or spastic muscles, Soothes strained voice,  Allows re-hydration of skin and articular cartilage. The element air is also a component of bodily humor Vaata. The decrease of air in the body due to Vaayu-shaamak mudra pacifies the (aggravated) Vaata. Therefore, this mudra is especially suitable for people of Vaata constitution (Vaata dosha). They can regularly use this mudra even to avoid illness.
Method of performing Vayu Mudra: 

*Let the tip of the index finger touch the base of your thumb, and press down the index finger lightly with your thumb, keeping the rest of your fingers straight to do the Vayu Mudra. Best benefit of Vayu Mudra is obtained by doing it in Vajrasan.

*It is possible that you start, burping or farting while doing this Mudra or thereafter, do not worry, it only means that your body is releasing the excess vayu(vatta) from your system. 
Caution:

Do not use this Mudra for more than 30 minutes at any point in time.  If badly required, it may be done 2-3 times a day for 15 minutes at each time. The moment your pain stops or you have obtained substantial relief, immediately stop using this Mudra.

Many experienced doctors say that the practice of this mudra should be discontinued as soon as the disease has been overcome.

Benefits:

*Stress
*Anxiety   
*Irritability   
*Lack of concentration 
*Timidity   
*Indecisiveness   
*Impatience   
*Restlessness
*Sleeplessness   
*Epileptic fits (convulsions)   
*Giddiness   
*Parkinson's disease   
*Chorea   
*Tremors 
*Sciatica 
*Gout  
*Dry & rough skin/hair 
*Brittle nails 
*Constipation 
*Flatulence (gas formation).
*Trigeminal neuralgia   
*Intercostal neuralgia   
*Twitching of eye-lids   
*Nystagmus (constant involuntary eye-movements)   
*Tinnitus (noises in the ear/s)   
*Vertigo   
*Dizziness  Hormonal imbalances caused by over activity of endocrine glands 
*Breathlessness 
*Tachycardia (fast heart beats) 
*Palpitations 
*Hiccups 
*Muscle-spasm 
*Muscle-cramps 
*Muscular rigidity 
*Crackling joints (Osteoarthritis) 

Precaution: If you are not sure how to perform this mudra, kindly contact any physician or yoga tutor.