Could I have brain tumor I have mild headaches for 5 days all over head pressure on eyes tho7gh gained 4 kg weight in 1and half month also less alert?

Doesn't sound like. a brain tumor, but something is happening in your body that could cause all of these symptoms and could get worse. You really do need to see a doctor and be examined. Ask to have your hormones checked. If you want to discuss further, you can get a Concierge consult here. Hope you find an answer. Good luck!