Hello everyone. For those who find it difficult to play the game. i will give you a hint. To get the yellow bar (The bar with two vertical lines) to go up, you must choose the correct oil/ointment/potion or whatever they're called (can be bought in the shop menu).
If the yellow bar goes up quickly that means you choose the correct ointment for your customer, if the bar doesn't goes up quickly, that means you chose the wrong ointment. keep in mind that normal ointment is necessary because some customer may prefer the normal one than any other ointment.
If you don't have the necessary ointment , DO NOT, i repeat, DO NOT use any ointment on them because the ointments are har to get. If the yellow bar already full, don't use any more potion, just use your hand (Without any ointment), try to save it for your next customer
Hope this hint helps.