How can i gain weight with a high metabolism?

Metabolic rate is the rate at which your body uses energy to carry out certain activity, physiological functions etc. High metabolic rate can be due to increased lean body /fat free mass or more body surface area. There are several other factors that can lead to high metabolism like hormonal disorders like hyperthyroidism, hyperparathyroidism etc., Side effects of drugs etc. Higher metabolism usually causes more caloric expenditure and thus, causes weight loss and resists weight gain. Increasing dietary intake can help you to put on weight. Take small frequent healthy meals. Do regular exercises consisting of both aerobic and strength training. Consult your physician and go for certain medical examinations to rule out the exact cause. And take medications if needed.

Hi Shikha,
Gaining weight for the peoples who have faster metabolism should consume more calories than what they burn. So first thing we need to note is that whether our daily activities is of less strenuous, moderate or very active lifestyle. Based on that you need to take more and more calories as more your activity more calories we burn.
Also ,we need to also take in to consideration following points in our daily lifestyle.:
1. Try avoiding undue activities so as to reserve the energy.
2. Never skip your meals however you dont feel hungry. Include some of food items like Muffins, Pazzta, bread, dairy products ,etc which are rich in calories.
3. Also, include dry fruits in your diet as they are rich in calories. Include them as a snack and carry in purse with you.
4. Also, try avoiding nicotine and caffeine as much as possible . These substances would lead to further increase in metabolism and burn calories .This is the reason that most smokers have lean body.
5. Drink fresh fruits or fruit juices without sugar .
6. Always carry a healthy snack in your purse so as to eat whenever gets time.
7. Maintain a diary to keep a track on your food and daily activities so as you can note your progression.