although

× The food was horrible. Although, we were hungry and ate everything.
√ The food was horrible. However/ Nevertheless, we were hungry and ate everything.

We never use although before a coma (,). In these cases, we use however or nevertheless (more formal). Look at the following possibilities.

• Although the food was horrible, we ate everything. 
• We ate everything, although the food was horrible. 
• The food was horrible. However, we ate everything.