My husband has not been able to eat solid foods for about 5 months now. he says it's as if his tongue wont allow the food to go down. the food gets stuck at the back of his tongue and he cant swollow. what could be the problem?

Needs timely eval: He is experiencing dysphagia that you can review on different sites, including Wikipedia. Causes are functional, as seen in strokes, for example or anatomic, infectious or caused by abnormal growth. Timely assessment is critical as otherwise it may result in nutritional deficit and significant weight loss.

Agree with Dr. P: If your husband has lost weight, it is imperative that he see a doctor as soon as possible. Start with a general practitioner and he/she can figure out the right specialist to be consulted. Wish you and your husband good health!