Premenstrual Syndrome (PMS) is usually due to hormone imbalances.
The hormone imbalances are particularly due to excess estrogen in relation to progesterone which will cause physical and emotional discomfort, fatigue, mood swings, fluid retention, breast tenderness, headaches and more.
Herbs and lifestyle changes can provide relief from the imbalance of hormones and help to balance the hormones.
Let's look at some natural ways to handle PMS:

• Vitamin B6 - this vitamin helps to relieve water retention.
  Water retention is associated with the symptoms of PMS and include swollen breasts, headaches and mood swings.
  Taking 50 to 100mg daily with a high-potency Vitamin-B complex will help with these symptoms.
  

• Exercise - this of course helps with any ailments but regular exercise of at least 30 minutes will help to lower the estrogen levels causing many of the symptoms.
  Exercise will alleviate your mood swings, depression and the anxiety associated with PMS.
  

• Balanced Meals - Foods such as caffeine, saturated fats, red meat, sugar and alcohol will stimulate excess estrogen production increasing the symptoms associated with PMS.
  By eating foods high in fibers, fresh vegetables, fruits, legumes, nuts, grains and seeds, you will help your body eliminate the excess estrogen.
  

• Consume the Right Fats - As mentioned above saturated fats are not advised for those suffering with PMS, but consuming the right fats will help.
  Foods rich in essential fatty acids will help to balance the hormones.
  It's important to eat at least one serving daily of a food rich in omega-3 essential fatty acids, such as salmon, sardines, cold-water fish, trout, walnuts and flax seed.
  

• Aromatherapy - it's amazing what a warm bath can do and it can help with PMS symptoms as well.
  Try a warm bath with Epsom salts and clary sage, and lavender essential oils to help ease the emotional tension.
  Soak in this bath for 20 minutes and see your stress and tension melt away.
  

• Herbs Help - for water retention try a tea made with dried dandelion leaves.
  The dandelion leaf is a gentle diuretic that can safely relieve PMS water retention.
  Chaste-tree berries have a sedative and antispasmodic properties and can help to balance the hormone levels.
  Adding half a teaspoon of this extract to warm water and drinking as a tea will alleviate the symptoms of PMS.
  

As you can tell, there are many alternatives to dealing with the imbalance of hormones that result in premenstrual symptoms.
Try one or all and watch your symptoms relieved the natural way.