I have dull skin. Have also depression.

Hello! Your ideal body weight range should be around 49kgs to 60 kgs It seems probably 1.you have a low appetite 2.you eat well but food is not digested properly 3.you don't chew your food well 4.you don't include food from all food groups 5.you have some underlying metabolic disorder. You just need to rule out above said issues one by one Also follow these simple yet effective solutions for weight gain. You need foods that are good sources of essential fatty acids like nuts and seeds, specially walnuts almonds & flaxseeds. Also eat fresh coconut everyday, anjeer shake , soaked groundnuts and chana, jaljeera & soups (  great appetizers & will cheer up your mood, tea & coffee only pop you up temporarily & kills your appetite also...so avoid) Cook variety of foods yourself which help you generate your interest in eating! Go for a complete exercise regime in early morning that charges your body & mind.