Hello, Definitely rule out an allergic reaction. Soreness with swelling could be a sign of an allergic reaction. This can be from ingestion or respiratory. Habits with your tongue and breathing through your mouth causes stress and dries out your tongue. You may be prone to an oral yeast infection with an oral flora imbalance. Redness, increased sensitivity and a coated tongue can indicate a fungal infection that will require the prescription Nystatin. Make sure that you are well hydrated is my number one recommendation. Drink lots of water and more water! Rinse your tongue with warm salt water. Gentle and proper daily dental care should include brushing your tongue. Take some anti-inflammatory medication such as Tylenol or Advil. Benadryl is also an effective antihistamine that can reduce swelling and allergic reactions. Avoid all irritants such s smoking, acidic and spicy foods. Keep a well balanced diet that includes vitamins. Deficiencies can cause problems to your tongue. Vitamin B12 promotes healing. I hope your symptoms decrease as your body responds to good care. See your dentist if oral symptoms continue or increase. Consider a visit to your physician for blood tests and a physical if you continue to experience systemic effects that may indicate a compromised condition. Thank you for your inquiry.