Hello.Black spot below eye extended,a possible diagnosis is seborrheic wart
You must be evaluated as soon as possible by a dermatologist
About digestive problem, if you dont feel tired, weight loss
or appetite loss
it is not worrisome but as your symptoms have long,
you must be evaluated by a gastroenterologist.
By now,you should avoid foods that cause gas: carbonated drinks,peas, cauliflower, artichokes.Eating too fast also causes gas.
I wish you good health.
(In case the answer would have been useful please indicate this)