You can have drumstick, provided you wash and boil it properly.

• Maintain a healthy diet with a variety of nutritious foods including whole grains, beans, peas, fresh fruit and vegetables, lean meats and low fat dairy products.
  If appetite is poor; soups, broths and fresh vegetable and fruit juices are a good way to maintain calorie and nutrient intake.
• Avoid refined sugars such as white flours (Maida based products) as they inhibit the activity of the immune system.
• Avoid foods and drinks with added sugars, including soft drinks, fruit juices with added sugars, cordial etc. Pure fruit juices should always be diluted 50% with water. Try soft and less spicy foods, if you have blisters in mouth too.
• Drink at least 6-8 glasses of water per day.

Include important nutrients like-

• Vitamin A present in papaya, mangoes, spinach, yellow pumpkin helps resist infection and is also an essential nutrient for skin.
• Vitamin C present in guava, orange, lime, sprouts also supports the immune system and helps fight viral infection.
• Vitamin E, which is widely distributed in foods, helps prevent scarring of the skin.
• Aloe Vera may help relieve itching and assist the skin to heal.
  Avoid stress and take rest to boost your immune system.